Forward Collision Avoidance Related Problems of the 2021 GMC Sierra 1500

Table 1 shows three common forward collision avoidance related problems of the 2021 GMC Sierra 1500. The number one most common problem is related to the adaptive cruise control (three problems). The second most common problem is related to the warnings (two problems).

Table 1. Forward Collision Avoidance related problems of GMC Sierra 1500


Recently reported Forward Collision Avoidance problems of the 2021 GMC Sierra 1500

The Adaptive Cruise Control problem

The truck randomly will not detect that it was shifted into park. Shifting between gears and back to park does not automatically fix the the issue and has taken up to 10 mins to turn the truck off. The adaptive cruise controls stopped working and can still use regular cruise control.   Read details...

The Warnings problem

I am writing to complain about that general motors has issued a retrofit program for 2022 model vehicles that did not come with safety features due to the microchip shortage. I purchased my vehicle new in 2021 and the vehicle did not have the option of having safety features at the time of purchase.   Read details...

The Automatic Emergency Braking problem

2021 GMC sierra at4, VIN [xxx] , NHTSA campaign 25v-274, gm case xxx. Brake pad monitor failed at 128,923 miles -- 24 miles after leaving penske Chevrolet (released at 128,899, ro xxx, 04/17/2026). Brakes became spongy immediately following service.   Read details...


Forward Collision Avoidance related problems in other GMC Sierra 1500 model year vehicles:



Sierra 1500 Service Bulletins
Sierra 1500 Safety Recalls
Sierra 1500 Defect Investigations