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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Gasoline Engine Problems
261 messages, Last post on Nov 24, 2009 at 6:35 AM
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We are looking to buy a 2006 Sierra 1500...We tow about 2000 lbs. and need to know the difference between these 2 engines...Our favorite boat ramp is fairly steep and we don't want any problems with power...We also have a 4.3 V6 Safari van that lugs down a bit , pulling the boat out of this ramp... Is there a big difference between the 06 and 07 trucks? Should we wait and try for an 07 instead? |
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95 GMC_350_Z71_1/2 ton_130K miles. Truck would run but loss of power at low rpm's. If you gave it full throttle it would run great. If you held gas lightly in reverse it would go but then stall after you took you foot of the gas. Mechanic said computer was telling egr to stay open so he replaced the ecm and said it ran better. I got it back and it ran the same for me. Put new fuel pump, stem, lines and filter and that fixed about 80% of it. It now won't stall but runs rough at 500 to 1000 rpm's.(the rpm's like to jump up and down) I went back and the mechanic hooked it up again to his sensor and the new ecm also telling the egr to open a little. He unplugged the solienoid(wiring harness) to the egr and now it runs perfectly but that doesn't mean its fixed plus the ses light came on later. What I can't figure out or him is what is telling the computer to open the egr when it is not supposed to. I don' t think that there is a leak in the vacuum lines or egr is stuck open because then it would still not run good when we unplug the egr. But if I am wrong, please don't be afraid to tell, hit me with whatever you got. I appreciate the help Derek |
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I have a 2001 GMC 5.3 and the truck wants to start on its own. It will crank over with the ignition off. If you put it in gear it doesn't do it but in neutral and park it does. I have a command start that I totally removed and it still does it. So it is not hte command start. I have removed the starter completely and and the wire is live. So it is not the starter. I have replaced the starter and ignition relays and it continues to turn over. It doesn't do it all the time but it happened today when I was no where near the truck and burnt out the starter. Any ideas would be great. |
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I degreased the engine on my 94 gmc sierra (350 4x4), and now my idle is high and the trans won't shift....some times at very high rpms. I'm assuming something is still wet, but it would be nice to know what. Please help, Jeff |
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Replying to: bwandersee (Oct 28, 2008 2:12 pm) I had a similar problem on my 2000 5.3 about 5 or so years ago. It would start with a rough idle and then either clear up or continue or get even worse. It seemed to me the engine was losing a cylinder. The check engine light would come after a while. The dealer spent a long time and multiple visits trying to fix this as it was intermittent and didn't act up at the dealer. Luckily it was under GMPP as they lots of time and threw parts at it and it was out of initial warranty. Once it finally misfired when in the shop they scoped it and determined one cylinder was misfiring. It even destroyed two cat converters because of the richness of the exhaust when it misfired. As I recollect it turned out to be the ECM that was bad and it was affecting only one cylinder. The codes set were always general misfire. |
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| IT STARTED WITH A FAINT TICKING SOUND WHEN I STARTED THE TRUCK. I TOOK IT IN BEFORE THE WARRENTY WAS UP, AND ASKED WHAT COULD BE CAUSING THE NOISE. I WAS TOLD IT WAS THE IDLE ARM TENSIONER, SO I CHANGED IT. THE NOISE WAS STILL THERE. AT 101,800 MILES, THE LIFTER FELL AND FLATTEN THE CAM. COST $3100.00 TO FIX OUT OF POCKET. HAS ANY ONE ELSE HAD THIS PROBLEM. | |
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Replying to: dmbaero (Mar 12, 2009 9:23 am)
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