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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 14, 2008
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Open Help Requests for GM
Help Request Answers
1991 Buick Regal 3.8L Poor Idle Quality, Hesitation, Stall VIN: 2G4WD5417M
this car came to my shop and the problem is to high at idle,(3000 rpm) actually i put another iac valve and i cleaned the throtle body, y check the pcv valve there isnt any dtc i was looking for any vacuum linkage but i didnt find anything. ill apreciate your ...
2000 Buick Park Avenue 3.8L LH tail and parking lamps stay on VIN: 1G4CW52K5Y
A very good customer of ours brought her car in last week claiming only the left front parking lamps and the left rear tail lamps stay on occasionally after the car is shut off (happened twice within about a week). We could not duplicate the problem that day. ...
1960 Cadillac SEVILLE 5.0L Mechanical
hey cadillac tech's sorry about the no vin & the incorrect engine size. we need to rebuild the engine on this old girl & i need some information on suppliers who would stock parts for old cadillacs. thanks again andrew
1997 Chevrolet Cavalier LS 2.2L Mechanical VIN: 1G1JF5244V
hi every one i have this 97 cavalier with a valve noise it sounds a little louder than a lifter before we take it apart has enyone ran into bad valve guides in a 2.2 or lifters thanks in advance jeff
1998 Chevrolet S10 LS 4.3L Poor Fuel Economy VIN: 1GCCT19W4W
i just got this truck havnt had much time to mess with it so i dont know much about it the truck is only getting about 13-15 miles per gallon on the highway just wanted to know if any one has had this problem before if it is a problem i have replaced the lower...
1999 Chevrolet K3500 5.7L power steering VIN: 1GDJC34R6X
Customers complaint is no power steering when turning left at slow speeds, if cylce brakes (hydroboost system) power steering will come back, if it was not hydroboost I would suspect valve problem in gear box, I dont have many heavy truck customers so it is a ...
1999 Chevrolet Express 3500 7.4L Poor Idle Quality VIN: 1GBHG35JXX
Car Ilde drops down to 300 rpm runs rough and feels like misfires, give it gas and doesnt want to go anywhere checked fuel filter and was very dirty replaced then was told it could be fuel pump psi was at 45 to 47psi replaced fuel pump check crank sensor and m...
1999 Chevrolet Malibu 2.4L cluster - turn signals - a/c - starting VIN: 1G1ND52T3X
Hello fellow techs - I have here a malibu with a no start - no turns - no a/c - and no cluster gauges or lamps.Car has theft codes in PCM & BCM. live data from BCM with snap-on modis shows this - ign 0 output- inactive - passlock data invalid- phase lock loop ...
2002 Chevrolet Trailblazer LS 4.2L window switches VIN: 1GNDS13S92
Howdy Everbody, College boy hooked the jumper cables up backwards and blew the 125 amp body fuse. I replaced the fuse and now everything works except the windows, I get battery voltage on the up/down signal wires and the lock out wire at the switches but no wo...
2002 Chevrolet C3500HD 8.1L brakes VIN: 5B4MP67G72
We had found that the left rear wheel speed sensor was melted. At that time we found the right front and left rear wheels were significanatly hotter (about 100 degrees) than the other two. After replacing it (left rear speed sensor) we took it for a test drive...
2003 Chevrolet Express 2500 6.0L Misfire VIN: 1GCGG25U33
hi every one, truck came in with engine misfire, run scanner and found code po300 random misfire, #6 misfire, truck never had tune-up, so replace spark plugs, wires, gas and air filter, after tune-up. started van and runs great, test drove and came back to sho... Trouble codes: P0300
2004 Chevrolet Cavalier LS 2.2L abs VIN: 1G1JF52F44
It feels as if the porpotioning valve is stuck. The rear brakes feel like they are doing the majority of the stopping. When braking the car squats rather than dives. It has worn out the rear brakes prematurely. I am getting on history code, c1214. Any response...
2005 Chevrolet Suburban 1500 Z71 5.3L transfer case VIN: 3GNFK16Z95
transfer case pops out 2WD into neutral at stop or shifting in between reverse & drive. Works fine in 4WD. no codes present. Have seen post about encoder motor sensor but can't find into in alldata about how to service sensor. anyone else have this trouble bef...
2006 Chevrolet Express G2500 5.3L MIL Lamp on VIN: 1GTHG35V86
remove injector rail found alot of rust type material in the rail and in the top of each injector installed new injector and cleaned the rail problem gone for now Does anyone know if their is a filter that can be put in line to help filter the gas Trouble codes: P0307
1987 Oldsmobile Cutlass Ciera S 2.8L Cuts out, Stall VIN: 1G3AJ11W2H
ECM or PROM??? While watching live data and having VOM hook to MAP signal return I can see that ECM is not 'reading' correct voltage along with associated symptoms.(off idle hesitation,stalling etc. VOM Does display correct voltage based on throttle but PCM li... Trouble codes: 34 (low map)
1998 Oldsmobile Silhouette Premiere 3.4L transaxle range switch VIN: 1GHDX03E6W
van came in with a complaint of sputtering and stalling after driving short distances. scanner resulted in code p0706-transaxle range switch performance. using snap-on tech. (mitchell) ran all diagnostic procedures. all seemed ok. but tried new TRS(nuetral saf...
1999 Oldsmobile Intrigue GL 3.5L engine VIN: 1G3WS52H9X
Hey guys, Customer states that has a long crank intermittent. Has codes P0335 & P0340. Both sensors were replaced. Leaning towards a ignition switch just because i have seen them do weird things before. Hoping someone had similar problem. Thanks Mike
2001 Oldsmobile Silhouette Premiere 3.4L cooling fans temp gauge VIN: 1GHDX23E31
This van has cooling fans that run all of the time when engine is running. Temp gauge not working. Trouble codes are po 128 engine below operating temp & inst cluster code b1440 power mode master input circuit miss match. When code is cleared for inst. cluster...
2002 Oldsmobile Alero GL 3.4L No Start VIN: 1G3NL52E92
Cranks o.k, no injector pulse, cold. Has spark. IS NOT AN ANTI-THEFT ISSUE !!! All injectors have voltage but are not grounded by the pcm. Pulse injectors with the scan tool and the car will then start and stay running. Once the car has run for about 5 minutes...
2002 Oldsmobile Alero GL 3.4L No Start, INTERMITENT VIN: 1G3NL52E12
vechile sits outside in sun for a period of time. the complaint is that it wont start and the door locks keep on unlocking and locking. when it stops the vechile will start. there are 5 codes due to loss of communication. plus in shop it will not start then tu... Trouble codes: U1000 (loss of communication), U1128 (loss of irc), U1255 (loss of class 2 commun.), C1298 (pcm class 2 serial data link fault), P1585 (cc inhibit/cc lamp control circuit)
1990 Pontiac 6000 LE 3.1L Surge VIN: 1G2AF54T2L
after it warms up in gear at times after setting at a light etc. for a while it will surge up and down and run very rich. smoke coming out the tail pipe. wh tryed disconnecting the map. no change the o2 no change, the ecm has been replaced. no change. the grou...
1992 Pontiac Firebird 3.1L Poor Idle Quality, FLUTTER VIN: 1GFS23T7N1
Firebird came in with a flutter at idle after warm up,this low milage car had all the original tune up parts so we replaced plugs wire cap rotor pcv valve fuel filter and found the distibutor was covered in rust so now its new also replaced the o2 sensor. no c...
1995 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZH5280S
Customer brought in for MIL on. Found DTC 11,no other codes in PCM and no codes found in TCM. Checked TCM for codes with scan tool and by shorting out ALDL to get overheat light flash, no codes found. On test drive found coolant to temp to run low, checked Ide... Trouble codes: 11 (PCM/TCM Codes Stored)
1996 Saturn SL2 1.9L belt tensioner VIN: 1G8ZK5275T
hello i sure hope some one knows how to cure this one we installed a new belt tensioner and belt since then when the ac is on and car is idn drive the belt tensioner makes a hard clicking noise we installed two after market tensioners and a new belt the ps and...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Regal 3.8L Surge, Stall, MIL Lamp on VIN: 2G4WB12L15
I'm still waitng for a reman ecm that I ordered about 2 weeks ago. Imagine that.I will repost this with any updates when the ecm arrives. thanks to all who replied the general thought was a bad ecm we will see. Trouble codes: P0113, P0118, P0137, P0140, P0341, P0502.
1992 Cadillac DeVille 4.9L engine VIN: 1G6CD53B1N
thank everyone for all their help. I utilized the responses and check as much of the passkey as I could. it was receiving a good signal from the key but only sending a 30 hz signal to the pcm. I was informed it needs to be a 60 hz signal. at this point it...
1999 Chevrolet Silverado 1500 5.3L seat tracks VIN: 2GCEK19T4X
So far it looks like the only way to resolve this is to buy new seat risers from GM at about $800 each, Now my wifes 98 Blazer is starting to do this,,,Thanks GM Engineers!!! How brilliant of you to figure a way to turn a place to rest our butts into a techinc...
2002 Chevrolet Camaro Z28 SS 5.7L Misfire VIN: 2G1FP22G92
Thanks to everyone who gave me great advice. It is very helpful to have other techs to workout these problem vehicles. The fix for this car was factory warranty on the converters. The dealer replaced both units and all is well. Thanks again for all the help.... Trouble codes: P0420.
2004 Chevrolet Cavalier 2.2L ignition lock cylinder VIN: 3G1JC1244T
thanks for your help if i didnt get a second opinion from you guys i would have had a steering column out today tapping with a hammer and turning key did the trick we replaced lock cylinder and key and everything works good thanks for the time saving tip phil
1994 Geo Tracker 1.6L performance VIN: 2CNBJ18U2R
My thanks to all nine of you who replied to my question. I'm not much of a welder unless it's a last resort so I got a new key and filled the hogged out area in the crank with JB Weld;it went together well and now it runs like a bear!
1997 Pontiac Bonneville SE 3.8L Starting VIN: 1G2HX52K6V
Ok the problem has finally happened to me the security light came on and vehicle would not crank over. What i found is the resistance is fine coming from resistor i bypassed from pass lock sensor. But when i turn the key on resistance is lost. Cut purple/white...
1999 Pontiac Grand Am GT 3.4L ecm VIN: 1G2NW52E2X
Thanks for the help. The vechile came from a used car lot upon furthur investagtion the computor spit out 2 more codes P601 EEPROM Flash Error and P1626 Loss of serial commucation with vechile theft deterent system. When I went to order a new computor found t...
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