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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 8, 2008
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Open Help Requests for GM
Help Request Answers
2000 Cadillac Eldorado ESC 4.6L MIL Lamp on VIN: 1G6EL12YXY
DID A TUNE UP,FUEL FILTER AND INDUCTION SERVICE. CK. ENG. LIGHT ON.(not sure if light was on before tune up) dtc p0171&p0174. fuel pressure 36 psi koeo. changed fuel pump. Pressure from new pump the same. changed fuel pump again.(delphi).Pressure @40 psi. Ch... Trouble codes: P0171 (bi lean), P0174 (b2 lean)
2003 Cadillac Escalade 6.0L suspension VIN: 1GTEK63N3R
well now heres one for you cadillac gurus hope you can help me out ive got an 03 escalade that has a wandering condition only when i go through a dip or even going over rough patches of road the steering remains stable but the body feels to be wandering scanne...
1967 Chevrolet camaro rs 327CID headlights wont close VIN: 124677N212
This car has recently been redone. The head lights open but dont close. I found the relay pack but dont have any wiring diagrams and am hoping someone has a diagram or info as to where to get one. All the relays look new and the wiring seems pretty much in ord...
1985 Chevrolet Corvette 5.7L Starting VIN: 1G1YY0782F
Here we have a 1985 vette that wont stay running. My scanner will not communicate with it either. Car goes as follows. Crank over wil run then sputter and die. Have spark and fuel pressure. If you hold it craking it will continue to run, but when key is releas...
1989 Chevrolet Camaro Iroc-Z 5.7L engine
Got a bad nightmare here. This camaro came in on a tow truck.Complaint was: running rough,sluggish on accel,backfiring through intake. Started diagnosing and found the following problems: intake leaking coolant,plugs & wires worn out,secondary air injection st...
1995 Chevrolet Caprice Classic 5.7L Misfire, MISS FIRES IN DRIVE VIN: 1G1BL52P9S
Hi everyone.I have a good one for you all.I installed a motor into this impala ss.The motor is from a 95 camaro.It starts fine but runs with hearing a little pop out of the exhaust once in a while.I checked the firing order and that is fine.When I step one the...
1995 Chevrolet C2500 5.7L Stall VIN: SORRY NO V
OK! Im having problems with this truck.After replacing the relay because of code 54 and getting hot(relay), about a week later it did it again turn off & relay hot. I exchange with a known good relay and no start, 15 minutes later it starts.so I replace the fu... Trouble codes: 54 (fuel pump relay)
1998 Chevrolet Malibu LS 3.1L Front suspension VIN: 1G1NE52M3W
We have a 98 Maibu that came in with a front end noise Clunk and rattle, we found that the right upper strut mount was worn out (the hole in the upper mount was actually oblonged). After replacing the upper mounts on both sides it now has a rattle like upper s...
2002 Chevrolet Suburban 1500 LT 5.3L Dome light VIN: 1GNFK16ZX2
I have stumper here. Customer complaint of no DRLS. Our inspection found a bad BCM. The BCM was replaced with a GM unit and programed by the dealer. All was well for a couple of days, now the customer says the dome lights stopped working. We diagnosed the vehi...
2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK29224
This truck keeps getting code P0045. Also after driving for a while code P0299 also appears. I followed diagnostics and leads me to replace ECM, but I'm certain that's not the cause. I commanded T/C solenoid with scan tool while using a test light as a jumper ... Trouble codes: P0045, P0299 (T/C underboost)
2004 Chevrolet Trailblazer LS 4.2L Headlights VIN: 1GNDT13S14
The original headlight bulbs in this Trailblazer lasted for several years. The replacements last a couple of months at best. We have tried several different aftermarket bulb brands, and have used GM bulbs as well, none seem to last any longer than the others. ...
2004 Chevrolet Tahoe LS 5.3L No a/c comp or rear air controls VIN: 1GNEK13ZX4
Hi all, this came in from a local body shop from a deer hit and the tech there did the replacement of items as needed and as usual brought it to me for the final a/c repair. system is sealed and I have no compressor initialization and rear air controls are ino...
2006 Chevrolet Malibu Maxx LT 3.5L MIL Lamp on VIN: 1G1ZT63846
Thank you in advance for any help you can provide. we had check fuel pressure which was good, air flow sensor, check every air hose, evap system, check for leaks on intake gasket, everything seems fine, Not quiet sure what else to check. Thank you. Trouble codes: P0171 (System Too Lean Bank 1), P0174 (System Too Lean Bank 2)
1998 GMC Jimmy Envoy 4.3L abs VIN: 1GKDT13W4W
Hi Everyone, This truck is in with an ABS pulse under slight braking. When checking trouble codes and doing diagnostics, no codes were present, and the rear speed sensor appears to be reading steady & normal, but both front sensors read periodically from zero ...
2003 GMC Sierra 3500 6.6L Check engine light VIN: 1GDJC34163
Vehicle came in with a return code P2066- fuel level sensor secondary problem. Checked fuel level sensor Ohms wise, 40 Empty, 250 Full. Does anyone know what tells the ECM to fire or power up the auxillary tank fuel pump to transfer fuel from rear tank to fr... Trouble codes: P2066 (Fuel level sensor secondary problem)
2000 Oldsmobile Alero GL 2.4L automatic door locks VIN: 1G3NL52T2Y
Replaced lf door latch with dealer part. Customer came back next day stating that doors did not lock when placed into drive. Tried things I've found in fix database, but have no owner's manual. Supposed to be relearn procedure. Nothing found in Alldata. Anyone...
2002 Pontiac Aztek 3.4L radio-rear speakers, romote door locks, heated frt VIN: 3G7DB03E12
has no rear sound from back seat or very rear speakers. only front speakers in doors and front tweeters work. i check'd at the amplifier and if my diagrams are right i have signals. so i ordered a used amp and installed it and the same thing. this car has ster...

Fixes & Summaries for GM
Fix/Summary Answers
1990 Cadillac Eldorado 4.5L Poor Idle Quality, Surge, lack of power VIN: 1G6EL1332L
thank you for all your replies. found and injector fuse blown installed new fuse vehicle running excessively rich. scoped injectors found ecm grounding #6 injector constantly replaced ecm. vehicle now has 18 inches vacuum and idles at a steady 800rpms thank yo...
1988 Chevrolet S10 2.5L Hesitation VIN: 1GCBS14E6J
Hi folks. Replaced defective distributor. I had a hunch, but figure get some other ideas too. Thankyou all
1991 Chevrolet Lumina Euro 3.1L Excessive Emissions, No Start, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 2G1WN54TXM
found #4 injector has only 6 ohms of resistance , but customer opted not to make repairs at this time so don't know if replacing would fix the problem completely Trouble codes: 45 (running rich).
1996 Chevrolet Cavalier 2.2L No Start VIN: 3G1JC1247T
We checked for continuity from lock cylinder to base of column and signal wire appeared to be intermittent. Fixed open wires that run down column from the lock cylinder. Thank you for everyone's help.
1998 Chevrolet K1500 Cheyenne 5.0L valve VIN: 1GCEK14M0W
Well one bent pushrod later and the truck runs like a wrsitwatch again. Thank you all IATN for allowing me to sleep at night by telling me that i did not bend a valve. Have a good day everyone.
1993 Pontiac Grand Am SE 3.3L gas in oil VIN: 1G2NE54N2P
2000 Pontiac Firebird Formula 5.7L Poor Idle Quality VIN: 2G2FV22G3Y
Customer decided that he will run vehicle as is for now (been this way for years) and we will investigate a little deeper when the time is right. I never was able to get the right answer on pulsation dapner and customer not willing to pull fuel tank and stick...
1996 Saturn SL2 1.9L pres. plate VIN: 1G8ZJ5275T
i had 17 replies to my saturn clutch problem and i appreciate all who commented. most believed the best avenue is to remove the transmisson for a better look at all the components involved. i convinced the owner to go this route and have scheduled it at a late...
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