Would a performance chip or an exaust leak at the manifold cause a trouble cods p0405? This isbmy second EGR valve.

Would a performance chip or an exaust leak at the manifold cause a trouble cods p0405? This isbmy second EGR valve. 1 Answer

What would cause the transmission to indicate fluid over fill & blow out vent when the proper amount of fluid was put in (& even after draining a quart after that? 4 Answers

2001 GMCz71 w/ 207,000 miles, well cared for. mech tells me my xfer case has a little leak, cleaned it up & we were going to watch it. 700 interstate miles later, undercarriage coated. Took it to de...

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 am installing a 98 sierra truck motor into a 99 suburban and the computers are different will this cause problems 3 Answers

the computer number in the truck is 16250279 and the computer number in the suburban is 16263494 both vehicles are GMC

Rough idle and misfiring at lower rpms. If I stomp on it it seems to run smoother. Replaced fule filter, cap and rotor, pcv valve, crank and cam position sensors, mass air flow sensor,. 1 Answer

After all parts were replaced I disconnected both battery cables and touched them together per a mechanics suggestion to "clear the computer ". Would a dirty egr cause this? Please help.