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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 24, 2006
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Open Help Requests for GM
Help Request Answers
1998 Cadillac Catera 3.0L timing belt VIN: W06VR52RRW
having a problem finding the proper alignment tools and or procedure for doing the timing belt. have been told buy another source that the crankshaft to water pump lock out tool is needed. if anybody has done these engines before and can be of help it would be...
2002 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54YX2
Hi all! Got me a Fine Cadillac car here with a yeller light on that looks like a bad drawing of an engine! My 'should have kicked it to the curb years ago' scan tool says it's a P1860 "See service manual". Since I don't have a service manual handy, I'm buggin ... Trouble codes: P1860
1993 Chevrolet Lumina Euro 3.1L oil pump shaft VIN: 2G1WN54T8P
Transmission had no gears forward or reverse, removed unit and found oil pump shaft broken at the end in the converter. Oil pump damaged, bearing for oil pump in valve body damaged, sleeve in channel plate damaged, and clutches damaged. Replaced all clutches, ...
1994 Chevrolet Lumina Z34 3.4L MIL Lamp on VIN: 2G1WP14X2R
This car brought to me from another shop that could not fix. Customer is complaining of intermittent SES light. My test drive will produce the light fairly consistantly on light acceration @ 20-25MPH. I performed the usual testing steps for a Quad Driver error... Trouble codes: P1640 (Quad Driver Fault intermittent), P0740 (TCC Error history)
1999 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R7X
Thank god this is a friend's vehicle. Yes, the Suburban is in for it's SAME 5th O2 problem in 1 year! My tech is pretty sharp, but his and the shop's credibilty are in jeopardy. The same tests are run, and the same O2 is found bad each time. We suspect some ki... Trouble codes: P0137 (bank 1 sensor 2 low signal)
2003 Chevrolet Express 2500 6.0L door locks VIN: 1GAGG25U13
All the door locks on this van will activate intermittently. We have experienced this problem while driving, koeo, and with the key out of the ignition. Usually the doors will unlock and then continue to try to unlock, but at times they will lock and do the sa...
2003 Chevrolet Express 3500 6.0L Engine Temp VIN: 1GBHG31U83
This van has an overheating problem with A/C on or when pulling a long grade. we originally replaced the headgaskets due to high HC in the cooling system and a leaky water pump. after the repair it continues to run in the red 250+ degrees when the A/C is on an...
2003 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF52E73
Hi Guys, I have a hard code on this one PO452. I have 5v ref signal at all the spots on the computer. I back probe 30,32,33,34. I'm not sure what the voltage should be at 55 and when I follow the wires 11,14,21 what are those values. I understand the EVAP code... Trouble codes: P0452
1990 GMC Tracker 1.6L No Start, Stall VIN: JGTBJ18U3L
Hi, customer complains of stalling and no restart for several minutes. Vehicle has ran fine for us, did a fuel tune, plugs, wires, cap rotor, fuel filter air filter, oxygen sensor. Fuel pressure at spec. scope checked fine. I just finished a twenty minute road...
1991 GMC C7000 Topkick C7H042 6.0L Mechanical VIN: 1GDJ7H1P7M
ok i need some help this truk runs good on highway and high idle.but when ideling very rough idle and stalls i chk the fuel presor is 30 psi i never show a TBI system with 30 psi it should be i think at 9 to 13 psi this the 2nd fuel pump that is this high the ...
1999 GMC Sierra 2500 SL 6.0L evaporater core VIN: 1GTGK29U8X
This vehicle came in wth the compressor belt chattering all postings suggested replacing ac compressor we did that and that problem has gone away. now we have a new problem, The evaporator core is freezing up like ablock of ice. we brought it back in and repla...
1997 Hummer H1 6.5L Low pressure switch VIN: 137ZA833XV
Hi group! This one came in with a smoked compressor. We installed new compressor and dryer. We noted that the compressor was running and nothing was in the system We installed a new switch(from hummer)and same condition. We noted that with the electrical plug ...
1997 Saturn SW2 1.9L Vent temp VIN: 1G82K8274V
I have a 97 Saturn SW2 that won't blow cold out of the vent. A leaking compressor was replaced 9 months ago along with the drier. When the car came in it had a low side pressure 40 and high side 175, with a vent temp of about 70 degrees. Ambient air temp was...
1998 Saturn SL2 1.9L I/P fuse panel VIN: 1G82K527XW
Hello, This car belongs to my technician, we don't do domestics so we don't have access to much info. The car will lose the radio and accessoies as well as the running lights. Wiggling the F5 wire on the back of the I/P fuse panel will get a temporary repriev...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Regal Custom 3.8L voltmeter VIN: 2G4WB55L1R
Hi group, First of all, I have to thanks all of you who answered my post, in fact the problem was in the printed circuit, there was a burn diode on that circuit, I donot know exactly if it is related to that problem, I think so, I replaced it and the problem h...
1996 Cadillac Seville SLS 4.6L Emergency brake VIN: 1G6KS52Y5T
I got 2 replies regarding vaccum source problems but vaccum source is fine( I thought I covered that in my post). Another said to check for updated software using scanner good idea but customer refuses to go to dealer anyway. the only other reply insisted that...
2000 Cadillac Catera 3.0L Alternator VIN: WO6VR54R6Y
Hi all, we switched from the AC Delco 334- series alt. to a 331- series. So far so good. 2 weeks and running! Thanks, David
1988 Chevrolet S10 2.5L No Start, floods VIN: 1GCBS14EXJ
The following morning after I opened my help request after getting some good advice I started in on the S-10 again. Allen from North Carolina advised me how to check for a computer problem or wiring. First thing I did was, I started the truck, which would not ... Trouble codes: 32 (egr).
1989 Chevrolet S10 4.3L Hesitation VIN: 1GCCS14Z9K
I got a few suggestions to buy a rebuilt TBI unit, but they are pricey, almost as much as the whole truck is worth. Also suggested to get one from a wrecking yard and rob the spring from it, but the nearest yard is 30 miles from here, and most have sold them. ...
1998 Chevrolet Express 1500 4.3L Starting VIN: 1GCEG15W6W
Thanks for the help, this one is fixed. Had several replies about ignition switch, but a bad switch will not supply power to your fuses. All my fuses had power. Two replies for ECM. Mine turned out to be the ECM and the connectors had 14 bad terminals. GM make...
1998 Chevrolet Malibu 3.1L Hesitation VIN: 1G1ND52M6W
Sorry for the late reply as we are waiting for the customer to return. Most post said the injectors were leaking down so we checked fuel pressre and let sit and the injectors did leak down. We double checked the regulator as this is a common problem and it was...
1998 Chevrolet Camaro 3.8L No Start, Stall VIN: 2G1FP22K5W
Hi everyone, This intermittent stalling vehicle is fixed with help from severial members. Thanks Rick, Larry, Dell, Daniel [...].,and Tony. There advise pointed out that the crank sensors in this vehicles frequintly go out with an intermittent stall a...
1990 Oldsmobile Toronado 3.8L No Start VIN: 1G3EV13C81
All five of you guys have certainly given me positive things to look for regarding this Oldsmobile. Unfortunately, I havent litterally had time to return working on the vehicle. The situation is this... the customer doesn't care if he has his car back until sn...
2000 Oldsmobile Silhouette GLS 3.4L Misfire VIN: 1GHDX03EXY
I did receive 5 replies, one said to check compression, which checked ok, 2 replies said possibly cracked heads, which we had that checked when we did the head gaskets, one said possibly clogged lifter, we had no lifter noise. We ended up replacing the spark p... Trouble codes: P0300.
2002 Oldsmobile Bravada 4.2L transfer case VIN: 1GHDT13S92
Well, this one isn't fixed yet. Most replies I've recieved said to change the oil in the transfer, then change it again. Also found an article that said to pull the fuses to the module when this occured pending a software update. Well, I did that and no fix, n...
1996 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZK5271T
new to iatn sorry about such a vague description reply about egr code was right on saved plenty of time and aggravation since then learned about knowledge base and forums wont waste tech request on simple code question thank you Trouble codes: P, 1406 (manufacturer control auxilliary emission control).
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