GMC Service and Parts Department in Hammond, LA
Ross Downing GMC's service department at 1301 S Morrison Blvd in Hammond, LA is a GMC Certified Service center for GMC service and repair, with technicians trained in GMC-specific service and repair on everything from a Terrain to a Sierra 2500 HD. GMC owners from Ponchatoula, Covington, Mandeville and Slidell use this page for the hours, phone numbers, services, current coupons and online booking.
- Mon to Fri, 7:30 AM to 6 PMservice hours; parts counter until 5:30 PM
- Service 985-222-2386parts 985-543-6833
- 9 priced couponsoil changes, brakes, batteries and wipers, with codes and end dates
- GM Genuine Partsand ACDelco parts, plus warranty and recall repairs
Hours and coupons on this page are current as of October 22, 2026; coupon prices exclude tax and carry the exclusions printed on each coupon.
Nobody Knows Your GMC Like We Do
From the wipers to the wheels, at Ross Downing GMC of HAMMOND, the Certified Service experts know the exact needs of your Ross Downing GMC car, truck, or SUV. Our GMC Certified Service experts are trained to know every inch of your vehicle and can help you keep it running with the performance you've come to expect from GMC.
Schedule Service
Schedule service and maintenance with our Certified Service experts today.
SCHEDULE SERVICEMulti-Point Vehicle Inspection*
Our GMC Certified Service technicians at Ross Downing GMC will complete a comprehensive look into your vehicle's tires, wiper blades, fluid levels, brakes, battery and more to keep your vehicle running exceptionally.
LEARN MOREGM Genuine Parts & ACDelco Parts
At Ross Downing GMC we're your one-stop shop for auto parts. Let us find the right part for your vehicle.
ORDER PARTSService Specials
Tire Price Match Guarantee
Provide us with a better eligible* price at the time of purchase and we'll match it. Find a better price within 30 days of the purchase, and we'll refund the difference.
Eligible Tire Brands: BFGoodrich, Bridgestone, Continental, Cooper, Firestone, General, Goodyear, Hankook, Kelly, Michelin, Pirelli, and Uniroyal.
Coupon Code: 201. *Ad, written estimate, or Internet quote for identical tire(s) from a competing tire retailer/installer located within 100 miles of the dealer required during guarantee period for price match. Tire match price must be determined prior to applying a tire manufacturer rebate, if any. At participating GM dealers only. Offer ends 12/31/2026.
Tire Pressure Monitor Sensor Rebate
Up to a $40 rebate* on the purchase and installation of four select tire pressure monitor sensors
Eligible brands are GM Genuine Parts or ACDelco Original Equipment ($10 rebate per sensor).
Coupon Code: 313. *Offer ends 11/30/2026. Purchase and installation must be made at a participating U.S. GM Dealer. Limit four tire pressure monitor sensor rebate claims per VIN. Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details around how to claim rebate, which must be submitted by 12/31/2026.
Brake Rotor Rebate
Up to a $60 rebate* on the purchase and installation of four select brake rotors
Eligible brands are GM Genuine Parts ($30 rebate per brake rotor set), ACDelco Gold ($20 rebate per brake rotor set) or ACDelco Silver ($15 rebate per brake rotor set).
Coupon Code: 318. *Offer ends 11/30/2026. Purchase and installation must be made at a participating U.S. GM Dealer. Limit two brake rotor rebate claims per VIN (one per axle). Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details around how to claim rebate, which must be submitted by 12/31/2026.
Shock Rebate
Up to an $80 rebate* on the purchase and installation of four select shocks
Eligible brands are GM Genuine Parts ($20 rebate per shock), ACDelco Gold ($15 rebate per shock) or ACDelco Silver ($10 rebate per shock).
Coupon Code: 319. *Offer ends 11/30/2026. Purchase and installation must be made at a participating U.S. GM Dealer. Limit four shock rebate claims per VIN. Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details around how to claim rebate, which must be submitted by 12/31/2026.
Strut Rebate
Up to an $80 rebate* on the purchase and installation of four select struts
Eligible brands are GM Genuine Parts ($20 rebate per strut), ACDelco Gold ($15 rebate per strut) or ACDelco Silver ($10 rebate per strut).
Coupon Code: 320. *Offer ends 11/30/2026. Purchase and installation must be made at a participating U.S. GM Dealer. Limit four strut rebate claims per VIN. Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details around how to claim rebate, which must be submitted by 12/31/2026.
Tire Offer
Buy 3, get 1 for $1 on select tires*
Coupon Code: 301. *Offer ends 11/30/2026. See participating GM Dealerships for details and list of tire brands. Purchase and installation must be made at a participating U.S. GM Dealer. Highest or equal value tire will be $1. Maximum consumer purchase price of $450 per tire. Additional taxes and fees may apply. Offer subject to availability and may change at any time. Limit one offer per VIN. No other tire offers apply. DEALER INSTRUCTIONS: For each valid tire offer redeemed at your dealership 10/1/2026-11/30/2026, claims for reimbursement can be submitted via the GM Tire Central website.
Brake Pad Rebate
Up to a $60 rebate* on the purchase and installation of select front and rear brake pads
Eligible brands are GM Genuine Parts ($30 rebate per brake pad set), ACDelco Gold ($20 rebate per brake pad set) or ACDelco Silver ($15 rebate per brake pad set).
Coupon Code: 303. *Offer ends 11/30/2026. Purchase and installation must be made at a participating U.S. GM Dealer. Limit two brake pad rebate claims per VIN (one per axle). Rebate will be issued as a Visa® Gift Card. See mycertifiedservicerebates.com for details around how to claim rebate, which must be submitted by 12/31/2026.
6-Quart ACDelco GM OE dexos®1 Full Synthetic Oil Change and Tire Rotation on most vehicles*
$89.95
Coupon Code: 202. *Tire balancing, tax, and more than 6 quarts of oil extra. Excludes diesel engines and Corvettes. See owner's manual for specific oil grades recommended by vehicle model. Offer ends 12/20/2026
8-Quart ACDelco GM OE dexos®1 Full Synthetic Oil Change and Tire Rotation on most vehicles*
$99.95
Coupon Code: 212. *Tire balancing, tax, and more than 8 quarts of oil extra. 8-quart dexos®R oil change may be required on 2021-2024 6.2L engines, please check with your dealership. Excludes diesel engines and Corvettes. See owner's manual for specific oil grades recommended by vehicle model. Offer ends 12/20/2026
Most ACDelco Gold Front Brake Pads Installed*
24 Months/Unlimited Mile Warranty**
$219.95
Coupon Code: 203. *Installation and rotor inspection included. Turning or replacing rotors, all other services, and tax extra. Excludes enhanced-performance brake pads and some vehicles. **Please see your Dealer to learn more about the warranty part details and qualifications. Offer ends 12/20/2026
ACDelco Gold Front Brake Rotors installed on most cars & small SUVs*
24 Months/Unlimited Mile Warranty**
$529.95
Coupon Code: 222. *Tax extra. Excludes coated rotors, enhanced-performance rotors, medium-duty trucks, and other select vehicles. **Please see your Dealer to learn more about the warranty part details and qualifications. Offer ends 12/20/2026
ACDelco Gold Front Brake Rotors installed on most trucks and full-size SUVs*
24 Months/Unlimited Mile Warranty**
$529.95
Coupon Code: 223. *Tax extra. Excludes coated rotors, enhanced-performance rotors, medium-duty trucks, and other select vehicles. **Please see your Dealer to learn more about the warranty part details and qualifications. Offer ends 12/20/2026
Most ACDelco Gold 30-Mo Batteries Installed*
30-month free-replacement limited warranty**
$224.95
Coupon Code: 207. *Tax extra. Installation extra on some vehicles. **Please see your Dealer to learn more about exclusions and the warranty part details and qualifications. Offer ends 12/20/2026
Most ACDelco Gold 42-Mo Batteries Installed*
42-month free-replacement limited warranty**
$224.95
Coupon Code: 240. *Tax extra. Installation extra on some vehicles. **Please see your Dealer to learn more about exclusions and the warranty part details and qualifications. Offer ends 12/20/2026
Most ACDelco Silver Wiper Blades (per pair) Installed*
$55.55
Coupon Code: 255. *Tax extra. Installation extra on some vehicles. Offer ends 12/20/2026
Most ACDelco Gold 36-Mo AGM Batteries Installed*
36-month free-replacement limited warranty**
$329.00
Coupon Code: 279. *Tax extra. Installation extra on some vehicles. **Please see your Dealer to learn more about exclusions and the warranty part details and qualifications. Offer ends 12/20/2026
Transmission Service
$10.00 OFF
Drain and refill the transmission/transaxle with approved fluid. Adjust linkage if necessary. Install filter and gasket. Check transmission/transaxle operation. Plus tax, if applicable. Not valid with other offers. Coupon valid at vehicle check-in.
Coupon Code: 15.
1301 S MORRISON BLVD, HAMMOND, LA 70403
FEATURED SERVICES
Multi-Point Vehicle Inspection*
Help keep your vehicle performing at its best with a thorough assessment of vehicle health indicators.
Oil Change
Regular oil changes are vital to your vehicle's function.
Tires
Roll down the road with confidence.
Brakes
For reliable stopping power, brake components must be monitored regularly.
Batteries
Power your next adventure with our latest batteries.
Additional Services
Find more services for your vehicle.
SCHEDULE CERTIFIED SERVICE NEAR YOU
Set up a time for our expert technicians to assess your vehicle.
Schedule ServiceGMC Service for Hammond, the Northshore and the New Orleans Area
Ross Downing GMC's Certified Service center in Hammond, LA serves GMC owners in Ponchatoula, Amite, Independence, Covington, Mandeville and Slidell, and GMC drivers from Metairie and New Orleans. Every service on this page is performed at 1301 S Morrison Blvd, minutes from I-12 and I-55, by GMC Certified Service technicians using GM Genuine Parts and ACDelco parts, whether or not you bought your GMC here.
What Services Ross Downing GMC Offers in Hammond
Ross Downing GMC's Certified Service department handles routine maintenance and repairs on GMC trucks and SUVs: oil and filter changes, tire rotation and replacement, brake pads and rotors, batteries, wiper blades, multi-point inspections, transmission service, diagnostics, and warranty and recall repairs, and the parts department orders GM Genuine Parts and ACDelco parts. The linked pages cover each service and its current coupon.
Maintenance
- Oil and filter change with ACDelco GM OE dexos1 full synthetic oil and a tire rotation, on most vehicles
- Tires: rotation, replacement and the Tire Price Match Guarantee on eligible brands
- Multi-point vehicle inspection of tires, wiper blades, fluid levels, brakes and battery
- Battery replacement with ACDelco Gold batteries, including AGM batteries
Repairs and parts
- Brake pads and rotors with ACDelco Gold parts
- Transmission service: drain and refill with approved fluid, plus a new filter and gasket
- Diagnostics with GM essential service tools and diagnostic information
- GM Genuine Parts and ACDelco parts from the parts department, covered by the parts warranty
Services from GMC Certified Service (GMC.com) and the Ross Downing GMC service coupons; coupon terms and exclusions are printed on each coupon.
Why Use a GMC Dealership for Service?
GMC says warranty repairs must be performed at a GMC dealership, and a GMC dealership's Certified Service technicians are trained in GMC-specific service and repair, with GM essential service tools and diagnostic information and GM Original Equipment parts from GM Genuine Parts and ACDelco. You do not need to have bought your GMC at Ross Downing GMC to have it serviced here, and routine maintenance is priced on the posted coupons, so you can compare before you book.
What the dealership brings
- Technicians trained in GMC-specific service and repair
- GM essential service tools and diagnostic information
- GM Original Equipment parts from GM Genuine Parts and ACDelco
- Warranty repairs, which GMC says must be done at a GMC dealership
Booking your visit
- Book online on the schedule service page or call 985-222-2386
- Mention a coupon code when you book; each coupon lists its terms
- New GMC owners: ask about the first scheduled service visit at no additional charge
- Parts questions: call the parts department at 985-543-6833
Source: GMC Certified Service (GMC.com).
GMC Maintenance Schedule: When to Bring Your GMC In
GMC's maintenance guide calls for an oil and filter change and a tire rotation every 7,500 miles, an engine air filter around 12,000 to 15,000 miles, a coolant flush around 60,000 miles, a transmission fluid inspection around 70,000 miles and spark plugs at about 100,000 miles for most vehicles. Your owner's manual or the myGMC app has the exact schedule for your model and engine, and new GMC owners get their first scheduled service visit at a participating GMC dealership for no additional charge.
| Service | GMC's general guidance |
|---|---|
| Oil and filter change | Every 7,500 miles |
| Tire rotation | Every 7,500 miles |
| Wiper blades | Inspect seasonally; replace when damaged or no longer clearing the windshield |
| Engine air filter | Around 12,000 to 15,000 miles |
| Cabin air filter | After about two years, or around 22,500 to 24,000 miles |
| Tires | Replacement somewhere after 30,000 miles; at 1/16 inch of tread or less, replace |
| Brake pads and rotors | First major brake service likely between 40,000 and 60,000 miles |
| Battery | About four or five years, generally around 60,000 miles |
| Coolant flush | Around 60,000 miles |
| Shocks and struts | Inspect between 60,000 and 75,000 miles |
| Belts and hoses | Inspect and possibly replace by about 70,000 miles |
| Transmission fluid | Inspect around 70,000 miles; some vehicles call for a flush, replacement and filter change |
| Spark plugs | About 100,000 miles for most vehicles |
| Differential and transfer case | Inspect as the odometer approaches 100,000 miles; a fluid change may be recommended |
Source: GMC maintenance guide (GMC.com). General guidance; intervals vary by model, engine and driving conditions, so check your owner's manual or the myGMC app.
Why Service Your GMC at Ross Downing GMC in Hammond
Ross Downing GMC services GMC trucks and SUVs at 1301 S Morrison Blvd in Hammond, minutes from I-12 and I-55, with service hours Monday through Friday 7:30 AM to 6:00 PM and the parts counter open Monday through Friday 7:30 AM to 5:30 PM. The Ross Downing Auto Group began when Ross Downing Chevrolet opened in Hammond in 1973. Call service at 985-222-2386 or parts at 985-543-6833, or book online, and your GMC is serviced by GMC Certified Service technicians with GM Genuine Parts and ACDelco parts.
GMC Service Near Hammond, Ponchatoula, Covington and Mandeville
Ross Downing GMC serves GMC owners across Tangipahoa and St. Tammany parishes, including Ponchatoula, Amite, Independence, Loranger, Covington, Mandeville, Madisonville and Slidell, plus drivers from Metairie and New Orleans. The service drive is at 1301 S Morrison Blvd in Hammond, minutes from I-12 and I-55.
GMC Service Questions
Can I service my GMC at Ross Downing GMC if I did not buy it here?
Yes. Ross Downing GMC services GMC trucks and SUVs no matter where they were bought. Book online on the schedule service page or call service at 985-222-2386. GMC says warranty repairs must be performed at a GMC dealership, so the service department here handles warranty and recall repairs as well as routine maintenance.
How much does GMC service cost at Ross Downing GMC?
Routine maintenance is priced on the service coupons on this page, each with its own code and end date. Repair and diagnostic pricing depends on the vehicle and the concern, so call service at 985-222-2386 for a quote on your GMC, and mention a coupon code when you book.
How often should I service my GMC?
GMC's general guidance is an oil and filter change and a tire rotation every 7,500 miles, with a multi-point inspection available at any visit. Filters, brakes, coolant, transmission fluid and spark plugs come due at higher mileages, as listed in the maintenance table on this page. Your owner's manual or the myGMC app has the exact schedule for your model and engine.
Can I service my GMC at a Chevy dealership?
GMC and Chevrolet are both General Motors brands, and many of their trucks and SUVs share engines and platforms. GMC says warranty repairs must be performed at a GMC dealership, so take your GMC to a GMC dealer such as Ross Downing GMC in Hammond for warranty work, where Certified Service technicians are trained in GMC-specific service and repair and have GM essential service tools.
Is there GMC service near New Orleans?
Ross Downing GMC's service department is at 1301 S Morrison Blvd in Hammond, minutes from I-12 and I-55, and serves GMC owners from the Northshore, Metairie and New Orleans. Book online or call 985-222-2386; the posted coupons are the same wherever you drive in from.
What is included in the first maintenance visit on a new GMC?
According to GMC, new GMC owners get their first scheduled service visit at a participating GMC dealership for no additional charge. It includes an oil and oil filter change, a four-tire rotation and a multi-point vehicle inspection performed by Certified Service trained technicians. Ask whether your vehicle qualifies when you book, or call 985-222-2386.
What are the service department hours at Ross Downing GMC?
The service department is open Monday through Friday 7:30 AM to 6:00 PM, and the parts counter is open Monday through Friday 7:30 AM to 5:30 PM. Call service at 985-222-2386 or parts at 985-543-6833, or request a service appointment online any time from the schedule service page.
Is it worth getting my GMC serviced at a dealership?
At a GMC dealership, Certified Service technicians are trained in GMC-specific service and repair and have GM essential service tools and diagnostic information, and the parts are GM Original Equipment parts from GM Genuine Parts and ACDelco. GMC says warranty repairs must be performed at a GMC dealership. Routine maintenance at Ross Downing GMC is priced on the posted coupons, so you can compare before you book.