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Prev Professional Automotive Repair Technical Discussions for September 23, 2004
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Open Help Requests for GM
Help Request Answers
1985 Buick Regal T-Type 3.8L tcc operation VIN: 1G4GK4794F
Hello GM trans. guys. I have a 200-4R in a Grand National that engages the TCC in 2,3, and 4th gear always. Cannot disengage even with trans. connector unplugged. This is NOT an electrical issue. Removed TCC sol. and tested with shop air. It does flow when not...
1994 Buick LeSabre Custom 3.8L Poor Idle Quality, Cuts out, Stall VIN: 1G4HP52L8R
This vehicle has an electrical gremlin of some type. After starting the vehicle the red coolant temperature warning lamp, the red voltage warning lamp, and the MIL lamp will sometimes begin to flash rapidly, however they may or may not do this, additionally wh...
1995 Buick Roadmaster Limited 5.7L ac compressor VIN: 1G4BT52P0S
hey fellow techs. i have this beast here that is not cooperating. i have no ac clutch relay operation. the pcm is not grounding the ac clutch relay. (drk grn/wht) wire. i have replaced the low/high pressure switch. i also have verified the pcm is receiving cor...
1996 Cadillac DeVille 4.6L No Start VIN: 1G6KD52Y4T
Hello everyone. We have this cadillac with the northstar motor. It started with an intermittent cranking with no start. At first it wouldn't act up but now is not starting at all. We have determined there is no injector pulse when not starting but we have spar...
1998 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y8W
I am trying to help another shop that has installed a new engine, then had a P0340 cam sensor code. They installed a new cam sensor, a used ignition module and PCM. I followed the Alldata cam code chart. The cam sensor resistance is about 1,800 ohms and the ... Trouble codes: P0340 (IC Module Cam Reference CKT No Frequency)
1982 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1AY0782C
Hi, I have a 1982 corvette in here for a code 44 (lean exhaust) condition. Initially we found low engine vacuum and timing over advanced. Timing has been reset to 6 degrees. I have replaced vacuum reservoir for headlamp system (vacuum leak from hole rusted thr... Trouble codes: 44 (lean exhaust)
1995 Chevrolet K2500 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 2GTFK29KXS
This truck has been worked on at another garage .Customerwants me to try and get it working. Truck has no power. Step on gas and it falls on its face.Won't accelerate . 13 PSI fuel pressure ,1qt volume 30 seconds cranking .Tried known good throttle body assemb...
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13WT2
Hi GM Techs. First of all, I would like to thanks for all techs out there helping solving this problem, I am run into this problem with vehicle drove into shop running misfiring with no power. Hookup scanner with trouble code P0300 Misfire Detect, Start check ... Trouble codes: P0300 (Radom Misfiring Detect)
1996 Chevrolet Monte Carlo Z34 3.4L Surge, Stall VIN: 2G1WX12X5T
This is a good one. When hot intermittantly at idle car will surge and die. No DTC's. Only odd data is long term fuel trim will bomb to +20% short term will also go to +20%. Front O2 stays down around 200mv and rear O2 goes to around 900mv. This is where the f...
2000 Chevrolet S10 2.2L MIL Lamp on VIN: 1GCCS1451Y
Hello,I have this one from a parts store, delivery truck,with code P0325b I took a chance and replaced the knock sensor with OEM part,and the code still caming back. Checked the blue wire at the ECM connector # 33 and can read signals from the sensor,with the ... Trouble codes: P0325 (knock sensor circuit)
2001 Chevrolet Silverado 2500 HD 6.6L Surge VIN: 1GCHK29161
This truck has a light surge of about 100 or 200 RPM's at idle. No codes. does not happen when driving down the road. Power is good. No shifting problems or any other indication any thing is wrong. Starts good at all times. I've looked at the scan data and don...
2002 Chevrolet Silverado 1500 4.8L Surge VIN: 1GCEC14V62
problem has happened twice in four months. after driving and warming up, when pulling in to a parking lot, vehicle accelerates on its own. the harder the brake pedal is pushed, the more it wants to accelerate. put vehicle in neutral and it revs to 7 or 8,ooo r...
2003 GMC HUMMER 6.0L battery VIN: 5GRGN23UX3
hope this is in the right place local firm have imported petrol hummer 6.0 litre vortec 2003 no info here on it battery goes flat over 2- 3 days 1 amp drain on battery if i set alarm drain is the same .no lights staying on , i need some help please ps what...
1999 Oldsmobile Alero GL 3.4L abs light VIN: 1G3N152E0X
Hello to all the GM tech's. I am mostly an asian import guy, but on occasion have to take care of domestic cars my customer's bring in. This 99 alero has traction control and abs. The customer complains of intermittent ABS light activation. They advise the l...
1999 Oldsmobile Intrigue GL 3.8L Mechanical VIN: 1G3WS52H5X
I,ve got this 99 intrigue that has a cold start problem.When started cold it runs very poorly, will not accept any gas and smokes badly. The only code present is #410 secondary air injection system malfunction. Is there something I should be leaning towards wi...
1992 Pontiac Sunbird SE 3.1L Excessive Emissions, Poor Idle Quality, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy
idles beter but not perfect with o2 sensor unplugged. with os sensor pluged in iac drops to 0 and engine speed increases and than sets a code 35 also sets a code 44 if left idling for a few minutes computer has also been replaced but not by us the car was at a... Trouble codes: 35 (unable to control idle), 44 (lean exhaust)
1995 Pontiac Grand Prix SE 3.1L Unknown VIN: 1G2WJ12M6S
Car came in with shudder and stalling when coming to a stop, went to test drive put in reverse, tranny went right there so no test drive. Flushed lines and put in GM reman 4T60-E trans. Also had to do an intake gasket and full tune-up. Finished started car up ...
1997 Pontiac Grand Am SE 3.1L power steering pump
Any help with this vehicle will be greatly appreciated. This car has come in three times in the past year for the front seal on the powersteering pump leaking. Everything in the steering system works good. No hard steering, no hoses or fittings leaking, just t...
2001 Pontiac Aztek 3.4L gauges dash lights stereo VIN: 3G7DA03E1S
cust complains everything cuts out and back on while driving down road or sitting but vehicle will continue to run and drive. sometimes happens several times in one day and then wont act up all day. i havent duplicated symptom. i have checked grounds and repla...
1992 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5492N
Hi guys, Just a quick one on this Saturn please. It has code 26 (quad driver fault) stored all the time. Checking both the EGR and purge solenoid they were high resistance (650k for egr) or open circuit for purge solenoid. The thing is though I borrowed a so... Trouble codes: 26 (quad driver fault)
1997 Saturn SW2 1.9L No Start VIN: 1G8ZK8276V
Car will intermittantly not start if left for 20-30 min after warmed up.If car left for another 30 min or so it will start.We check computer for codes found none.We checked coolant temp sensor and conctor and fuel pressure regulator for leaks,as these cars are...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac DeVille 4.6L Instrument Cluster VIN: 1G6KD52Y7T
Thanks for all who helped. After doing some backprobing and wire tracing, found bad ground at lower left kick panel. Fixed ground and cleared codes related to bad ground and all digital dash functions now working properly. Thanks again.
1966 Chevrolet CORVETTE 327CID headlamps VIN: 194676S119
Thanks so much for the quick replies. Especially Jerry [...]. The limit switch for the right headlamp bucket was out of adjustment.A little fine tuning and all is well. Thanks again for the speedy help!
1993 Chevrolet Lumina APV 3.8L No Start, Runs on carb clean VIN: 1GNDU06LPT
Thanks to all for your suggestions on this problem. After sharing the bill for parts and time with the customer (my brother in law) he decided to junk the car.
1994 Chevrolet Lumina APV 3.1L Exterior tail light circuit VIN: 1GNU06D4RT
Thanks for great advice. The short was were the loom went from the rocker to over the door pilar just like someone had mentioned to me. The loom had rubbed were it goes threw an opening in the drivers side door pilar. We fixed it up with some new wire and some...
2000 Chevrolet Venture 3.4L temp guage VIN: 1GNDX03E5Y
temp guage only moves around at idle with a/c or defrost off(no cooling fan)as soon as vehicle is moving or a/c is on ( cooling fan on) guage stays just under half and stays there. customer did not want to invest any more time or money at this time,customer is...
1996 GMC Jimmy 4.3L code 1860 VIN: 1GKDT13W3T
sorry for the long wait between the post and the fix...I wanted to make sure the truck was fixed...I tested the tcc solonid and the restiance was infinate so i replaced the solonid for the convereter lock up and the truck hasent returned yet..thanks to everyon...
1995 Pontiac Grand Am SE 2.3L engine VIN: 1G2NE55D7S
Thanks to all 17 who replied. Most of the replies concerned basic items and head gasket checks; however, over half of the replies suggested a blocked heater core and / or restrictor in the heater hose. Sure enough, the heater core was blocked. This system gets...
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