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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado and GMC Sierra Electrical and Computer Questions
358 messages, Last post on Dec 02, 2009 at 4:47 AM
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I have a 2006 Silverado LS 1500 WD ext cab, a 6 cylinder with 4 speed auto transmission. Everything works fine except when I'm using cruise and doing about 55 and I reach a small hill, the tach jumps to twice the RPMs as the transmission shifts, then the RPMs abruptly drop to normal again. The tach is always in the safe zone. The dealer said (without driving the truck) that this was normal, but it's kinda annoying. Is there a problem?
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| I have a 2006 gmc duramax diesel 2500hd the change fuel filter comes on the display so I replaced it then did what the owners manual wrote to reset turn on ignition to run wait 5 sec. the push brake and gas peddle down at same time for 10 seconds it is reset but it dont seem to work is this reset by a timer or a senser? | |
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Hi everyone, Recently, my 2k Silverado 4.8L has been dificult to start when it's hot. I suspected my EGR valve so I disconnected it to see but got the service engine light on now. I know it's not the EGR now but the light stays on. I remember my dealer telling me once how to reset this but I forgot. Could anyone help? Thanks
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Replying to: gangof4 (Sep 16, 2006 11:00 pm) Your RPMs do increase when the transmission downshifts but not as much as the tach would indicate. Any sensitive electronic meter will do that given a sudden change in input. It's called overshoot. I don't think you have anything to worry about. |
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Replying to: canayjun64 (Oct 20, 2006 4:47 am)
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Replying to: jneal (Oct 23, 2006 5:55 am) Now I'll have to see why it's so hard to start when the engine is warmed up. Thanks again!
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My 2000 GMC 2500HD 8.1 L is reporting the following trouble codes: 1)MAF or VAF A ckt range/perf 2) MAF or VAF A ckt low input 3)IAT Sensor 1 circuit High Input 4) Manf Cntrl Veh. Spd Idle Speed Control Auxiliary Inputs I have checked visually for any loose connections or vacuum hose issues. Can anyone sugest how to isolate the problem to the root cause??? Thanks
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Replying to: lon986 (Nov 05, 2006 10:31 am) I would check the MAF and the IAT sensor. Either one can cause all the others but I lean more toward the IAT sensor. |
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