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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 9, 2006
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Open Help Requests for GM
Help Request Answers
1987 Buick Regal GNX 3.8L No Start, ADVANCED TIMING VIN: 1G4GJ1176H
This car came in for a no start/ cranks hard. I am able to make it run by switching the plug wires on the coil towers two possitions to the right. The engine will run at 8 degrees btdc. I removed the harmonic balancer and inspected the interrupter ring for sli...
1996 Buick Century Custom 3.1L Misfire VIN: 1G4AG55M1T
Intermittent misfire. This vehicle originally had a no-start condition. We repaired that by replacing the TPS. Now the vehicle misses intermittently, more when one turns left from a start. We replaced the coil pack and module, MAF sensor, MAP sensor with known... Trouble codes: 1374 (7X pulse does not match 24X)
1999 Buick Park Avenue 3.8L Seat Vertical Adjustment VIN: 1G4CW52K3X
Okay this is a great one, I have this 99 Park Ave, the seats will not adust vertical. Everything else works, I found the PLASTIC Worm Gear with stripped teeth inside the housings. Buick cannot order just the motor or gear,. It only comes as a Seat Track Assemb...
1998 Cadillac DeVille 4.6L Compressor Cycling VIN: 1G6KD54Y3W
Fellow Techs, This vehicle came in with insufficient cooling. We found pressures a little low and recovered the refridgerant to find it was .5 lbs low. Upon recharging the system the compressor cycles off before the system is cold enough. The temp out of the d...
1999 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1245X
customer booked car in for intermittant no start, no starter. when she dropped off the vehicle she also added that for the last two years she has always had a hard time starting her vehicle after refueling. i load tested her battery to find ok, but while doing...
2001 Chevrolet S10 LS 4.3L plenum drain VIN: 1GCDT13W11
This is my wife's truck, I need to get this figured out. In the summer when operating the air conditioning we start to get a musty smell inside the cab. If it has been real hot & humid you can hear water sloshing inside the plenum. The plenum seems to drain so...
2001 Chevrolet S10 4.3L No Start VIN: 1GCCT19W31
no start problem...symptoms indicated fuel problem.. fuel module replaced...ran scanner with po 452 code no other codes shown...checked with network on possible fixes with ignition switch problem indicated on a number of fixes. ignition switch replaced...still... Trouble codes: P0452
2002 Chevrolet Cavalier LS 2.2L enginbe turns over no spark VIN: 1G1JS12412
car towed in no start turns over ok fuel system ok checked ignition system no spark checked with scanner has rpm when cranking crank and cam sensors ok was to the point of checking wiring harness in engine compartment and discovered that with key in on positio...
2004 Chevrolet Malibu LS 3.5L steering gear VIN: 1G1ZS54884
i have this 04 malibu with a clunk noise when turning . this vehicle does have Electronic Power Steering. on the hoist, turning back and forth, i can hear the clunking noise. with a stethoscope, can hear rack internally clunking. i did check ball joints, tie r...
2005 Chevrolet Classic 2.2L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1G1ND52F25
This vehicle runs ok most of the time with no problems. The all of a sudden will begin to run lean and sputter Found A TSB on a faulty fuel pump strainer but fuel pressure is within specifications. No vac leaks found. STFT number range from +20% to +49.2% LTFT... Trouble codes: P0171 (system too lean bank 1)
1997 Geo Tracker 1.6L No Start VIN: 2CNBE186XV
no codes. no fire. has inj. pulse and getting gas. tried diff. distributor. both dis. have the same readings; ignition voltage from main relay, 5 volt square wave from cmp to pcm, good grds., ignition coil control trigger. the last 2 items i question: ignition...
2002 GMC Sierra 1500 SL 4.3L pinion VIN: 1GTEC14W52
this truck came in with a complant of a winning niose while driving, and a jerking @ 70 mph. I test drove to verfy complaint. Noise grows in intesity up to 70 mph, at whicth time I could not hear it. Never did get it to jerk. Upon disassemly of diff. found wea...
1991 Pontiac Firebird 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, Poor Fuel Economy
car came in with rough idle complaint all the time ,cap was lead tracking and cracked, 2 plug wires shorting to grd, 5 of 8 injs very low resistance or shorted, fuel psi 41 idling with fuel reg connected, after all these repairs car still has a lean misfire , ...
1999 Pontiac Grand Am SE 2.4L Cuts out, Stall VIN: 1G2NE52T8X
When cold, within 2 minutes of starting vehicle, it will just die. It initially starts fine, you put it in gear, take off, and then let off the throttle it will die. When you try to restart it, it sounds like it has no compression. If you hold the gas to the f... Trouble codes: P0705 (Trans Range Sensor Ckt)

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal LS 3.8L evrything in the dash turn signals shift releaseha VIN: 2G4WB55K6Y
thanks for all the replys . we had a voltage drop out of ign sw. replaced ign sw pt# d1491d.most replys were for ign sw.
2000 Cadillac DeVille DTS 4.6L Compressor Clutch VIN: 1G6KF5792Y
Turns out that even the ttech2 cannot communicate with this car because of the 'non factory' radio and the remote start. Client is haveing the original radio installed and removing the remote start and then he will have it checked with the tech 2 and go from t...
1996 Chevrolet Tahoe 5.7L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2GNEK18R9T
Tech's sorry took so long to tell you what the problem was, had sikness in family then went on vacation. We did redo the dist. , reajusted valves, checked compression. found out their is a updated fuel injection spider assembly installed vech runs good now. ... Trouble codes: P0300 (ramdom missfire), P1345 (crank/cam correlationproblem), P0135 (02 heater ckt bank 1 sensor 1).
1996 Chevrolet S10 4.3L Cuts out, Stall VIN: IGCCS14X5T
Thanks for all the great replies!This was a tough one to diagnose because when problem occured I had very little time to check any thing.All of the replies were good things to check and I checked them all.I had read a fix in the fix database about a TSB and a ...
1996 Chevrolet C3500 Cheyenne 7.4L MIL Lamp on VIN: 1GBKC34JXT
Shoot, well I gave the truck back to the customer. I tried a coil and module as suggested. I checked for a voltage loss at the ignition switch and PCM during cranking. I checked for fuel pressure and volume during cranking and for loss of voltage at the fuel p... Trouble codes: 1351 (System voltage low Timing circut).
2001 Chevrolet Tahoe 5.3L excesive cank VIN: 1GNEK13T11
gent, Thanks for all the replies. Lot of gm guys So rended up replacing the fuel pump due to the pressure droping so qick, new delco pump had some harness modification. We checked fuel pressure regulator, wasnt leaking, but replaced it anyway. Car starts right...
2001 Chevrolet Silverado 2500 6.0L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GCHK29U71
found excessive carbon build up on valves and inside intake . at high rpm the carbon on top of valve would hang valve open just enough to cause engine misfire. we tried to use carbon vac machine a few times to try and clean some of it out without pulling intak... Trouble codes: P0300 (engine misfire).
2002 Chevrolet Silverado 2500 HD 6.6L interior lights(dome) VIN: 1GCHK23182
Thanks to all tha treplied with good ideas. Just a little more info. for you before the fix... The trailer wiring is the factory set up and all was good. We had the relay, for the running board light removed from the circuit and taht did not help. Mike from N....
1996 Pontiac Grand Am SE 2.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 1G2NE52T4T
Thanks for all of your help with this. I got another Grand Am in the shop for other repairs. So I swapped the coil tower from the running vehicle to the nonrunning car and the car ran great. So I replaced the whole coil tower and spark plug boots. Trouble codes: 300 (random misfire), 301 (random misfire cyl 1), 302 (random misfire cyl 2).
2000 Pontiac Grand Prix SE 3.1L No Start VIN: 1G2WJ52J6Y
finally got car on lift, saw that crank sensor in side of block was damaged. pulled drain plug and watched the coolant drain then some oil mixed with many small metal pieces. used engine and all is well. thanks for the help. I learned something on this one. ...
1996 Saturn SL1 1.9L Misfire, MIL Lamp on VIN: 1G8ZH5281T
2001 Saturn L200 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8JU52F21
Sorry for the length but I learned a lot. The problem was jumped timing chain. The tensioner was sticking at times when first started and allowed the chain to jump. If you have a customer with one of these engines and have the chance to listen to it start pay ... Trouble codes: P0300.
2003 Saturn Vue 3.0L door locks VIN: 5GZCZ63BX3
Thank you to those that replied. I started working on the door locks because of the customers main complaint. I ignored the codes. Alldata program had very little information on door locks. Thanks to Tom from Alberta on his reply. He gave me a diagnostics char...
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