general problems of the 2015 GMC Sierra 1500

Fuel pump losses prime overnight. Gas sprays from fuel line onto top of fuel tank. Problem was brought to my attention by a repair shop. . Found several instances listed on youtube of this problem.

Cross member holding file tank rusted through causing the fule tank to not be supported and shock mounts no longer support the shocks to frame causing shocks to bounce around with possibility to puncher fule tank or lines also rear cross member that holders electrical components rusts off excessive rust on top of fule tank causing a inability to make repairs without replacing fule tank in entirety.

62,000 miles. P0307 error. Replaced spark plugs, coil. Head removal, lifter replaced and now another bad lifter. Faulty active fuel management lifter (afm lifters) that results in the valve train defect. In shop for lifter repairs. (2nd time) cost is $3000. Well maintained truck with all required service completed. Never even towed anything. Vehicle should not have these issues with this low mileage.

When driving about 40 to 50 mph the truck shakes like it has a bad cv joint on your driveshaft and when I bought the truck I took it in for this problem and the dealer said it's normal due to engine shutdown of cylinders. So I lived with it when my warranty ran out I got a check engine light due to same problem but now the dealer said I need new fuel injectors all of them are bad per dealer and to replace was 1500 dollars. I feel this was original issue and want to see if other customers are getting same bad issues.

I have fuel return line leaking gas is this covered under GMC warranty.

Truck will not change gears and sputtering. Bad gas mileage and not wanting to start.

Driving my new 2015 GMC $52,000 GMC sierra, I noticed a distinct slipping/hesitation/general roughness when accelerating from a dead stop. The truck seemed to either have a transmission or engine problem. Took it back to dealership for them to check, and they indicated that this was "normal" and it was just the "cylinder deactivation" feature performing as designed. I explained to them that cylinder deactivation only typically happens at highway speeds and especially not from a stand still. They stuck by their story and again stated this was normal. My son came to see me and drove my new truck. Of course the truck hesitated and slipped from a dead start. "what's wrong with your new truck dad?" he asked. I told him it was 'normal and he just rolled his eyes. This is not normal for every sierra that GMC makes with the 5. 3 engine and 6 speed transmission would do this. I have read on numerous message boards and websites where this is an issue and gm needs to fix the problem. Also, the headlights are extremely dim and are barely usable. As others have stated, I can only see maybe 20-30 feet in front of me and not very bright at that.

When accelerating on an incline or hill or trying to pass traffic on the interstate the truck hesitates or stutters. This seems to happen when applying light acceleration. It almost feels like the transmission is having difficulty finding the correct gear. This is apparent to both driver and passengers. This has occurred since the truck was new and seems to be getting worse. The truck currently has 13,000 miles.

Since gm transmission software recall,truck is continually slipping in all gears,non and partial engagement of gearbox,very sloppy gear changes. This is a major safety issue,while operating on the freeways of southern California. Headlights are not within safety standards for lumens as per government headlight standards. This is a safety issue,dealership is at a loss,since gm has not given a fix or replacement for this problem.

When accelerating at a very slow speed the engine seems to misfire or sputter and then the engine increases rpm and the truck accelerates as expected. Overall the engine lacks power and there is loud clicking sound that originates from the engine compartment area. I spoke with service manager at GMC and I was told that clicking sound was normal and GMC was working on the acceleration problem.