Table 1 shows one common electrical system related problems of the 2017 GMC Sierra 3500.
| Problem Category | Number of Problems |
|---|---|
| Electrical System problems |
Trailer brake system connection warning intermittent when towing it will say trailer not connected, while still having a secure 7 pin connection. This causes me to loose trailer brakes. My camper is nearly 14,000 lbs. Very dangerous situation. Happened since new. Was into / complained to gm service dept over 6 times.
Service trailer braking system. Faulty control in the dash. Known issue per mechanic but no recall issued. Safety issue as trailer brake may not function properly when towing as a result.
My truck is affected by gm’s engine block?heater safety recall (NHTSA 21v?496 / gm n212329840) addressing a risk of short circuit and potential engine?compartment fire at the heater cord/terminal connection. Gm’s interim action has been to remove/disable the block?heater cord, which my dealer did, and then marked the recall “completed. ” as a result, the NHTSA VIN tool shows 0 unrepaired recalls, even though no actual repair/restored functionality exists and gm continues to advise owners not to use the block heater until parts are available. Safety concern / impact: I live in a cold?weather area and purchased this diesel expecting a functioning block heater for reliable cold starts. Disabling the heater has removed an intended cold?weather safety/starting aid for multiple winters without a final fix. Gm’s bulletin explicitly allowed dealers to disable the cord to close the recall, rather than provide a repair, leaving owners without the feature indefinitely. Suspiciously, I have also had to replace glow plugs on this truck sooner than traditional wear / failure rates would demand - including one glow plug that has been replaced twice in short span of time (should have lasted years). I continue to monitor gm’s recall portal; still no parts/remedy schedule. Please review whether gm’s chosen remedy—disabling a safety?related feature and closing the recall—is adequate and within a reasonable time under the safety act. If not, I request NHTSA open a recall query into remedy adequacy and timeliness so owners receive a real repair (replacement heater/cord/connector) or appropriate alternative remedies.