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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 20, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal GS 3.8L Fuelpump VIN: 2G4WF5519Y
Can anyone tell me what this fuelpump should draw amperage wise. This car is supercharged and day one car would start and run for 10 seconds fuel pressure would drop from 55 to 10 while dying, after stalling could hear pump run and pressure back to 55, so we r...
1988 Chevrolet Cavalier 2.0L Cuts out VIN: 1G1JC5115J
Customer towed car in said it simply died while driving and wouldn't start again. Next morning I went out and tried to start it. Turn over nicely but doesn't even try to fire. I grabbed some brake cleaner and doused the throttle body to clean it and also see i...
1995 Chevrolet Astro 4.3L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1GKDM19W3S
This Van starts and runs fine for about 10 minutes, then it cuts out, runs, cuts out again does this then finally dies, it's barely driveable when it's doing this.. Restarts fine but the problem starts again after about 5 seconds. If you let is sit for a few m...
1997 Chevrolet Venture 3.4L Driver's Window VIN: 1GNFG15R2V
This vehicle came in with the driver's power window regulator all bent. I got a new regulator and installed it but for the life of me can't get it to stay "locked" in position. There is a pin that the spring winds around and go's thru the plastic frame and loc...
1998 Chevrolet C1500 Silverado 5.0L Hesitation VIN: 1GCEK19M5W
Truck came to shop with a lack of power specially under load. no codes, we change MAF, fUEL filter (clug). and still the same. Fuel presure, back pressure, even the fuel trim and O2 sensors work good when the lack of power is accuring. Please help did I miss s... Trouble codes: N0
2000 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEK19T7Y
Truck came in with p0137, noticed reading .40 mv all the time. Watched other bank sensor 2 and voltaged moved. Tested power for heater 12. volts, ground is good, tried another ground same result, low voltage all the time. the purple and white wire is the high ... Trouble codes: P0137 (Bank 1 sensor 2 low voltage)
2000 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1GBFG15M7Y
This truck came in with a misfire code p0300 checked misfire data and found it was misfiring on cyl# 5 we found good spark but the new spark plug was fouled out with fuel.( customer replaced cap, rotor, wires, and plugs ) We replaced the injector assy and and ... Trouble codes: P0300
2006 Chevrolet Silverado 2500 HD LS 6.0L MIL Lamp on VIN: 1GCHK24U56
We've been fighten the pickup for about a year. Any repairs we've done last for about a month and it goes into reduced power mode and sets code P2135. We've done the throttle body pigtail as per TSB. We've replaced pcm, gas pedal, tac module, and ran new wires... Trouble codes: P2135
1992 GMC C1500 Sierra 4.3L engine VIN: 1GTDC14Z0N
The engine is makeing a top end noise and there is no oil getting above the camshaft... the bearings have been checked and are not spun, the passage ways look to be clear when using a bore scope to see and also blowing air through the gallies, the lifters are ...
2004 GMC Sierra 1500 5.3L light VIN: 2GTEK19T64
Hi This truck has a C0223 code that comes on with in a day of driving, Customer states it happens when he goes over a bump on the right side or this morning when backing out of his driveway. Ill graph the wheel speed sensors on a teat drive and i see no glitch...
2001 Pontiac Grand Am SE 3.4L Hesitation, Surge, Misfire, Low power VIN: 1G2NF12E11
Idles fine, no load revs fine, put in gear it hestates and at bout half throttle it has missfire on all cyl, if test drive it hestates,off idle and up to about half throttle, somtimes wont shift unless let up of pedal under heavy load it spark knocks,we have t...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L heat control VIN: 1G4HP54K1Y
replaced actuator motor.motor from dorman was wrong.noise from dash was motor moving apparently trying to find park position.thanks to all the help.
2003 Buick Park Avenue 3.8L starter VIN: 1G4CW54K93
Found it.. The crank fuse supplies input voltage to the bcm and PCM to activate the starter relay.. So the wire runs from the rear fuse box to the passenger fuse box to the bcm to the underhood fuse box and then to the PCM. Between the underhood fuse box and t...
1991 Cadillac DeVille 4.9L No Start VIN: 1G6CD53B6M
Thanks to everyone that sent help, I will call this one my own stubborness and assumptions. The first thing I stop diagnostics when the telltale never came on and ASSUMED that at least it should do the bulb check. Now the repair was broken wires, I don't kno...
1985 Chevrolet S10 2.5L No Start VIN: 1GCCS14EXF
This vehicle is fixed!! I found the 2 wires that go from the coil to the engine harness had shorted together. Tim [...] thanks for the very useful info, led me down the right road to finding the short.
1994 Chevrolet C1500 5.0L alternator VIN: 1GTEC14K1R
somebody changed the alternator too the one wire alternator.thanks for all your help
1998 Chevrolet Corvette 5.7L power steering VIN: 1G1YY32GBW
Hello all Well I guess i can call it fixed. The customer was supposed to bring it in today to diagnose it but called me this morning and said he was out with it on Saturday and hit a bump and the power steering started working perfectly. He wanted to use ...
1999 Chevrolet K1500 Suburban 5.7L Stall VIN: 3GNFK16R8X
sorry to get back to you so late,it ended up bieing a defected fuel pump from the dealer,replaced it with another one from dealer works ok,thank every body for the help.
2001 Chevrolet Suburban 1500 LT 5.3L Stall VIN: 3GNFK16T11
I drove this thing around for about two days with a fuel pressure gauge taped to the windshield, never acted up, the day they picked up they brought it back running bad, hooked the fuel gsauge back up and went and drove it, guess what the fuel pressure was goi...
2002 Chevrolet Silverado 1500 4.3L motor VIN: 2GCEC19W92
first of all thanks too everyone that replied.Richard from Arizona hit it on the head.Removed timing cover and found the timing chain had slop in it.The marks were still dead on replaced with new one and all was well.I guess there was just enough play to allow...
2003 Chevrolet Cavalier 2.2L Poor Idle Quality, vibration at all rpm VIN: 1G1JH14F73
The problem turned out to be a small amount of mud on the AC condensor fan! Started car, stuck a screwdriver in the fan had another guy turn the AC on, it idled perfect. Removed screwdriver, vibration from hell! The amount of mud was maybe 3-5 mm thick and a...
2004 Chevrolet Venture LS 3.4L drivetrain VIN: 1GNDX03E84
Wow never would have suspected a starter drive gear but sure enough the bendix spring was broken and on right turns drifted over and clicked against ring gear thank you to all who answered awesome fix coudnt have done it without iatn Bill [...]
2007 Chevrolet Uplander LS 3.9L MIL Lamp on VIN: IGNDV33W57
Hello gang, Thanks to all of you who took time to replay.Finaly I have this one on its way.I replaced the injectors and had some improvement,but not enough.Then I pulled pcv line off the valve and watch the fuel trims and they still read rich.So I took a chan... Trouble codes: P0172 (Rich bank).
1997 Geo Metro 1.0L No Start VIN: 2C1MR2263V
Thanks for all the help people. I have learned from this vehicle that when checking resistance on cam/crank sensors that they can spec out good but still are bad. found crankshaft sensor was glitching, had to manually fire the injector with an injector tester,...
2001 GMC Yukon XL 1500 SLT 5.3L Front Driveline VIN: 3GKEK16T71
First thanks to those of you that sent a responce. I assume it is fixed, Eric, Garry, and Paul all said what it is doing is normal, even though I felt the front drive line is tighter than I felt it should have been. Terry said there was a TSB to replace the fo...
2004 GMC Yukon XL 1500 SLT 5.3L abs light VIN: 1GKEC13T34
Thanks for the help, I sent the ebcm out for repair ,got it back in a week and that fixed it, First time for sending one of these out Thanks again
1994 Oldsmobile 88 Royale 3.8L abs lamp, cruise control VIN: 1G3HN52L9R
Julian from Penn. Hit it head on about the Cruise not working due to the ABS. I found that the Pressure Modulator Assembly was bad. I Ohm tested LH Front Inlet and found a infanite value and not 5-8 ohms like i was supposed to be seing. I determined that this ...
1997 Oldsmobile Aurora 4.0L moniters wont set
thanks michael from new york found this car is canadian emessions sent to GM took them 2 weeks to find the right program for it ill know to look at that label next time thank you
1997 Pontiac Sunfire GT 2.4L MIL Lamp on VIN: 1G2JD12T8V
i replaced pcm with another new one and all is good.i guess rebuilt is not a sure fix,will know better next time.thanks to those who responded
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