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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 7, 2006
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Open Help Requests for GM
Help Request Answers
1985 Buick Somerset Regal Limited 3.0L No Start VIN: 1G4NM27L7F
Cranks no start cold, will start warm if you can get it to run, but lacks power and stalls, runs rough and rich. C3I ignition, type 1. new coil and wires. checked crank and cam signals at ign module w/voltmeter when cranking, both fluctuate between 2-4 volts. ...
1992 Buick LeSabre Limited 3.8L Misfire VIN: 1G4HR53LXN
Hello, Anyone have any idea what I might be overlooking here? The car only misses/vibrates (front of car jumps up and down as if a tire is out of balance) under a load at about 47 to maybe 55 mph and only in overdrive with the TCC engauged, with a slight acce...
1992 Buick Century Custom 3.3L Hesitation, Stall
Hi all !!! We have a 92 century that seems to start good and it revs up nice and smooth but at idle it stumbles and wants to stall ( sometimes does ) On a road test it will stumble a little on acceleration, and the more speed it picks up it smooths out, runs g...
1999 Cadillac Catera 3.0L fuel door,radio, trunk release VIN: W06VR52RXX
This Catera is something strange, onece in a while the radio, the fuel door switch, and the trunk release switch become inop. then when the key is recycled they'll sometimnes come back on. it's so intermittent. if anybody has come across something likle this p...
1995 Chevrolet Blazer 4.3L No Start
i have got a good one. this blazer came in for a no start. the battery was dead from where the customer tried to start it. after charging the battery for 6 hours the blazer started. no codes were found in it except for an egr code which was disconnected by som...
1996 Chevrolet Tahoe LS 5.7L lo range VIN: 1GNEK13R6T
i have a 96 tahoe electric transfer that is in low 4x4 dont seem to want to come out.if i push the buttons on the dash they they will start blinking but nothing changes.so i assume they are doing their job.i am not familiar with operation of these electric one...
1996 Chevrolet C1500 Cheyenne 5.7L master cylinder VIN: 2GCEC19R2T
customer's original complaint was-brakes noisy-pulsation & low pedal-proceeded as a normal brake job,replaced front pads & rotors-replaced rear shoes & wheel cyls. & machine rear drums.pedal still low - replaced master cylinder,replaced abs hydralic unit,repla...
1996 Chevrolet Blazer 4.3L Shift Motor?? VIN: 1GNDT13W9T
This Blazer is stuck in 4wd. Will shift 4 hi & 4 lo with no problem. When 2 hi is touched the light flashes, the tccm clicks & the shift motor acts like it is trying to shift, it clicks in unison with tccm. I get 12 volts at tccm when pushing corresponding but...
1997 Chevrolet Corvette 5.7L Cuts out, Stall, MIL Lamp on VIN: 1G1YY22G7V
code p1514 tac system, idles fine but when accelerating mil comes on, goes to reduced power setting, kicks in code, inspected all work done earlier by dealer and cust, appears fine, tried another maf sensor(had one handy)no difference, scan seems to show good ... Trouble codes: P1514
2001 Chevrolet Blazer LS 4.3L alternator VIN: 1GNC518W91
i have a charging system problem i have replaced two alternators and a pcm in this vehicle and can get it to charge i have no power to the red wire on the connector which comes from the pcm and is the exciter wire i have tested the wire from the pcm to the alt...
2003 Chevrolet Tahoe LT 5.3L rear heater VIN: 1GNEK13Z43
I have a rear heater problem. The heater core is fine I have plenty of water flow. The problem is in the climate control in the rear. The mode door in rear works fine, the blend door motor does not. Since the motors are the same part number, I switched motors,...
1972 Oldsmobile Cutlass 350CID no spark VIN: 3J57K2R175
Here I go again! I don't have spark after I replaced the cap, rotor & points. I don't know if it had spark previous because it sat for 7 years. It probably is the way I set my points, let me know what you think. Here is how I set em', I had the distibutor on t...
1996 Oldsmobile Bravada 4.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 16HDT13W9T
At this time engine surges at idle, engine is rough at idle. Mifire counters show cylinders 1,3 & 5 misfireing at idle. As soon as throttle is moved off of idle misfired disappear, surge disappears and engine vacuum climbs to a normal 18-19 in HG. I have perfo... Trouble codes: P0300 (random misfires)
1997 Oldsmobile Bravada 4.3L Accessories VIN: 1GHDT13WXV
Hi, I have this suv that the blower motor don't have power to the fuse or have power to the window fuse .I check all the fusible link,they are okey.I would like some help with this suv.
1998 Oldsmobile Cutlass 3.1L starting VIN: 1G3NB52M9W
The customers complaint was the battery, brake, abs, and air bag lights are on. Performed a battery and charging system test. Alternator is charging at 14.8v, so I checked the archives for any simular problems and came across with someone replacing the alterna...
2002 Oldsmobile Bravada 4.2L Control Arm Bushings VIN: 1GHDT13S42
Hi fellow techs, I have a customer with a 2002 Olds Bravada All wheel Drive, Air suspension in the rear. The front control arm bushings are worn on it. He doesnt want me to dissassemble it before I have the parts in the shop. Here is my Question. Aldata show...
2002 Pontiac Aztek 3.4L battery light VIN: 3G7DB03E72
customer brought in car said alternator was bad had been at a nother shop they replaced the battery i tested the battery checked the cables and cleaned terminals so we replaced the customers alternator everthing okay took car out for a ride soon as we got back...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Cadillac DeVille 4.6L Light VIN: 1G6KD54Y12
Hi Guys! As I said in my other posts on here, I'm sorry its taken so long to get back to you. Personal problems on the home front. The customer of this Cadillac has requested me to find a used module to install since a new one is around $776.00 his cost. S...
1988 Chevrolet C1500 Cheyenne 5.0L Hesitation, Misfire VIN: 2GCDC14H7J
Wow. Thanks to all who responded! Lots of fast replies. I had heard about the distributor shaft problems, but strangely, haven't had many issues with them up here. In this case, changing the EST module fixed the concern, so thanks to those who turned my head i...
1997 Chevrolet K1500 5.7L No Start VIN: 2GCEK197V1
Hey guys thanks for the help, I guess I shoudnt have mentioned the correlation code. I did check it more than once replaced everything or tried other good known parts. Have a friend that works at a GM dealer, he mentioned the valves, I never gave it a ... Trouble codes: P1345 (CKP Error).
1997 Chevrolet Blazer 4.3L starter VIN: 1GNDT13W3V
thanks for all your help roger from indiana had it right. The back of the alternater had a wire not connected i checked all the replies this morning and went to work and applied all your replies to what we had done.So thanks again for all your help.
1999 Chevrolet Blazer 4.3L speedometer VIN: 1GNDT13W0X
Disconnected computer and speed sensor. Then used a light jumpered into the pigtail for the sensor and applied battery voltage to the terminals in the computer harness to see if the harness would carry a load. Did this to check for broken strands in a wire. Fo...
2000 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K1Y
we replaced the ckp as likely cause of intermittant trouble (that we never did duplicate). had some suggestions to check other items like ign 1 relay-was ok. and icm-was ok (we actually put the oem one back on). car has been away for a couple weeks now and... Trouble codes: P0336 (crankshaft position ckt).
2000 Chevrolet Silverado 1500 4.3L engine VIN: 1GCEK14W0Y
Thank you to everyone who took the time to reply. We did a little more investigating. We finally ruled out everthing we could think of so we broke down and put a longer belt on. Amazingly problem solved. Apparently there is a misprint in our parts catalog, it ...
1998 GMC Jimmy Envoy 4.3L intermittent VIN: 1GKDT13WXW
Receiving all the replies, they hit the nail on the head. I called the GM dealer to order a switch. Guess what?? There was a service bulletin on the ignition switch for the same complaint. I replaced the switch. The customer has ran the vehicle 500 miles. He i...
2001 GMC Yukon Denali 6.0L No Start VIN: 1GKEK63U01
It is finally fixed. This passkey system does not use a special key, it has a system in the lock cylinder and housing. I found that the switch for the key in lock was bad so I replaced the ignition switch, lock cylinder and housing. With the BCM not detecting ... Trouble codes: B2961 (Key in ignition circuit malfunction).
2004 GMC Sierra 1500 SLE 5.3L left inner axle VIN: 1GTEK19Z24
The first thing I tryed was to put the retaining ring in the side gear because the stub shaft has a nice taper to it. This would not have helped for the next time, but our shop schedule was way behind at this point. After several attempts and having to fish th...
2004 Pontiac Sunfire SE 2.2L engine VIN: 1G25B12F74
Sorry it has been so long before I have replied back about this sunfire. This diagnosis was tough, being the noise could only be heard about 5 seconds after engine was started. The other technicians and I came to the conclusion that it was a lifter or 2 bleedi...
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