Warnings Problems of GMC Sierra 2500

GMC Sierra 2500 owners have reported 4 problems related to warnings (under the forward collision avoidance category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Sierra 2500 based on all problems reported for the Sierra 2500.

1 Warnings problem of the 2020 GMC Sierra 2500

Failure Date: 12/19/2025

The main tailgate will not go down or function properly and it says online there is a national recall for this, but does not come up when I search my vehicle. When I turn on my left turn signal the brights flash for no reason and this is a known major issue with the vehicles as well. The trucks computer is telling me low on coolant even though it is not that has already been fixed through a 3rd party warranty parking brake was stuck on when I bought the vehicle and had been for a long time you could tell and I had to pay over $1100 to fix it at gm. The Ford collision system does not work properly and the cameras will come on at certain times when they're not supposed to be and not come on when they are supposed to be.

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2 Warnings problem of the 2024 GMC Sierra 2500

Failure Date: 01/05/2025

The systems have become unavailable. Took to dealership and they were told it just needed a software update. Dealer performed update gm sent and did not work. Dealer was told gm engineers would need to find a fix. I complained to gm and asked that they replace the cameras, especially because the vehicle is under warranty, and I was told no because that won't fix the issue. They don't even know what needs to be done to fix the issue though, but won't try a camera swap. They told me I need to take it back to the dealer so they can run diagnostics on it when the issue happens. I don't know what is so hard to understand that the issue is always there; the systems don't work and my dash always has the light the forward collision system not on and given a message when I start the truck that it is not available. This began to be an issue around 9000 miles. It first started by saying window camera blocked due to frost, but when it was clear, and I cleaned every camera and sensor, it still would not come on. This was 1. 5 months ago. I don't understand why they are not trying to expedite fixing this safety issue. The dealer can't do anything until gm tells them to change out camera or send another fix, but there is no software fix available. I can forward emails between myself and gm and you can clearly see they are not listening. If that would be helpful, please let me know how to forward them.

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3 Warnings problem of the 2016 GMC Sierra 2500

Failure Date: 09/12/2021

While driving down the road pulling a trailer the steering wheel started to get sloppy it got up to 3 to 4 inches of play in the steering wheel before the wheels return either way the adjustment screw locking nut and clip all came loose and backed out and caused a slap in the steering gearbox the truck became unsafe to drive I had to park the truck until the parts were ordered and the whole gearbox had to be replaced at a cost of over $1500. Gm has service bulletins out there on this problem they all came from one assembly factory but they said they would not repair the truck it was under my expense.

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4 Warnings problem of the 2021 GMC Sierra 2500

Failure Date: 02/24/2021

The truck is parked at dealership.

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Other Common Forward Collision Avoidance related problems of GMC Sierra 2500



Sierra 2500 Service Bulletins
Sierra 2500 Safety Recalls
Sierra 2500 Defect Investigations