GM Trucks and SUVs Brake Assist May Weaken

NHTSA campaign 19V645000 · Reported Sep 6, 2019 · General Motors LLC

high How serious is it? About this label

Reduced brake assist and a longer stopping distance increase the risk of a crash. The notice does not tell owners to stop driving.

Key facts

NHTSA campaign number	19V645000
Reported to NHTSA	Sep 6, 2019
Manufacturer	General Motors LLC
Part affected	Service Brakes, Hydraulic:power Assist:vacuum
Vehicles covered	4 model/year combinations, model years 2018
Do-not-drive advisory	No
Park-outside advisory	No
Repair	Free at any franchised dealer

What's wrong, in plain English

In some Silverado, Tahoe, Sierra and Yukon trucks and SUVs, the vacuum pump that helps power the brakes may lose vacuum over time. As the vacuum drops, braking takes more effort and the vehicle needs a longer distance to stop.

What you should do

1. Check your VIN at nhtsa.gov/recalls to confirm your vehicle is included.
2. Contact a dealer or GM customer service (Chevrolet 1-800-630-2438, Cadillac 1-800-458-8006, GMC 1-800-462-8782) to schedule the repair.
3. The dealer will reprogram the Electronic Brake Control Module, free of charge.

Where do I find my VIN, and what do I tell the dealer?

Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 19V645000. More in how recalls work.

Affected vehicles (4)

2018 Chevrolet Silverado 1500
2018 Chevrolet Tahoe
2018 GMC Sierra 1500
2018 GMC Yukon

Who to contact

Chevrolet — official Chevrolet recall lookup

Customer service: 1-800-222-1020

GMC — official GMC recall lookup

Customer service: 1-800-462-8782

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Chevrolet Brake Recalls Include Fire Risks and Reduced Brake Assist · all 18 Chevrolet recalls in this area
GMC Brake Recalls Cover Reduced Assist, Software Errors and Leaks · all 11 GMC recalls in this area

Other GMC Sierra 1500 recalls

May 21, 2026Chevrolet Silverado, GMC Sierra Roof Air Bag Inflator Riskhigh
May 7, 2026Chevrolet Tahoe, GMC Yukon Wheels Can Lock Upcritical
Mar 19, 2026Chevy Silverado and GMC Sierra Roof Air Bag Defecthigh
Feb 26, 2026GM vehicles may be missing the electronic owner's manuallow
Feb 12, 2026Chevrolet Silverado, GMC Sierra Transmission Wheel Lockup Riskhigh
Dec 17, 2025Wheelchair Restraints in Various Vehicles May Not Lockhigh

All 32 Sierra 1500 recalls

Official notice

Component: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
Summary: General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
Safety risk: As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N192268490.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.