Home › GMC › Sierra 1500 › 20V603000
GM Trucks And SUVs Lose Brake Power Assist
medium How serious is it? About this label
Reduced brake assist increases the pedal effort and stopping distance needed, raising the risk of a crash. The notice does not tell owners to stop driving.
Key facts
| NHTSA campaign number | 20V603000 |
|---|---|
| Reported to NHTSA | Oct 1, 2020 |
| Manufacturer | General Motors LLC |
| Part affected | Service Brakes, Hydraulic:power Assist:vacuum |
| Vehicles covered | 5 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
On these Cadillac, Chevrolet, and GMC trucks and SUVs with a 5.3L or 6.2L V8 engine, the mechanical vacuum pump that helps power the brakes can lose output over time. As the pump weakens, the vehicle gets less power assist for braking, so it takes more pedal effort and a longer distance to stop.
What you should do
2. Contact your GM, Cadillac, or Chevrolet dealer to have the Electronic Brake Control Module reprogrammed; call GM customer service at 1-866-522-9559, Cadillac at 1-800-458-8006, or Chevrolet at 1-800-630-2438.
3. The repair is free.
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 20V603000. More in how recalls work.
Affected vehicles (5)
Who to contact
Cadillac — official Cadillac recall lookup
Customer service: 1-800-458-8006
Chevrolet — official Chevrolet recall lookup
Customer service: 1-800-222-1020
GMC — official GMC recall lookup
Customer service: 1-800-462-8782
The bigger picture
- Cadillac Brake Recalls Involving Lost Braking and Missing Warning Lights · all 7 Cadillac recalls in this area
- 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
Official notice
- Component
- SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
- Summary
- General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.
- Safety risk
- A decrease in brake assist can increase the brake pedal effort and distance required to stop the vehicle, 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 November 11, 2020. Owners may contact GM customer service at 1-866-522-9559, Cadillac customer service at 1-800-458-8006 or Chevrolet customer service at 1-800-630-2438. GM's number for this recall is N202300860.
Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.