my 2000 gmc sierra runs good and has no problems in the city. The Only problem it has is when it gets on the highway, it will only go up to 60mph and 65 would be forcing it .. What might it be ???

my 2000 gmc sierra runs good and has no problems in the city. The Only problem it has is when it gets on the highway, it will only go up to 60mph and 65 would be forcing it .. What might it be ??? 4 Answers

I have a 2015 GMC Sierra with only 4000 miles on it and it makes a rattling noise when it starts then when it hits 210 on temperature it stops the noise what could be the issue 15 Answers

It only does it in the mornings and it sounds like something is either loose or just vibrating against other metal. I have no problems with the truck or from what i can tell it just makes that annoy...

04 gmc sierra 1500 5.3 died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was zero) anyways checked fire none checked injectors they wasnt working either(built fuel pressure then unplugged fuel relay then turned engine over and the pressure stayed the exact same) i assume it might be the crank sensor but i would think it would throw a code, anyways came back this morning and before doing anything for the hell of it i checked the gas cap and tightened it and it fired up perfect three different times and the last time i let it run and it died after bout 45 seconds (fuel pressure reads 55) and after it died its doing the same thing cranks but wont fire or start 1 Answer

died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was...

I have a 1994 gmc z71 with the 5.7 engine. When the truck gets to normal operating temp it loads up and stalls at low rpm's. The only way it will restart is holding the gas pedal to the floor. 2 Answers

I have replaced both injectors, fuel filter and complete tune up including the coil and the distributor pick up. Any help would be great.

I have A 08 GMC Sierra 6.0 1500. My heat only works when I am driving the truck. It blows cold air when the truck is in park no matter how long it idles. Any ideas on what could be the issue? 1 Answer

I have even driven the truck to get the heat warm and then put it back in Park in let it idle and it cools back off