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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 4, 2006
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Open Help Requests for GM
Help Request Answers
2003 Buick Century 3.1L low air pressure light VIN: XXGWXXXJX3
I saw this car for the first time today. The elderly lady driver hit a curb with the right front wheel. Now the low tire pressure light remains lit. All tires inflated to 35 PSI. Scan reveals Code C1245 low air pressure. The info I find on this says C1245 is r...
1997 Cadillac DeVille 4.6L dies at times VIN: 1G6KD54Y3V
customer complaint is that is dies at times with no warning and at anytime like idling in gear or driving down the highway. it was in about two weeks ago and we drove it and when it died we lost fuel pressure and replace fuel pump and reflashed compuiter for p... Trouble codes: P0603 (pcm keep alive memory), P0741 (tcc perf or stuck off), P1599 (cc power mgmt mode or engine stall), P1630 (theft learn mode or system volt error), U1016 (loss of pcm communication), U1040 (loss of ebcm/ebtcm comm)
1985 Chevrolet K10 Suburban Silverado 5.7L tv valve VIN: 1G8EK16L7F
Howdy there, And first let me say,,, I knew better! I tried to talk him out of it but here we are... I built this unit 6mos ago and we put it in the CJ and are just getting it filled and noticed that the detent cable is impossible to move when running. After s...
1988 Chevrolet Celebrity 2.8L Surge, no power VIN: 2G1AW81W2J
car wont go over 20 MPH -- but will spin the tires from standstill - Problem is I got wrapped up into doing a scan -- all garbage and all screwy ( RPM 600 KOEO , MAT = 158 etc) so I "jumped" and replaced the ECM which had no improvement. Confirmed with a Mas...
1989 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 2GCEC14K7K
This is my brothers brother inlaws truck [ we just haven't had any luck with this one]. Came in no power, stalling and a bad tip in. First thing we noticed was egr valve was coming on as soon as the throttle was pushed and would stick on after letting go. Most... Trouble codes: 42 (ets timing code.)
1991 Chevrolet Lumina Z34 3.4L lifter noise VIN: 2G1WP14X9M
Hi Fellow Gm techs. Have an oldy but beuty. Vehicle has lifter noise it comes & goes. Added oil additives better but still there. Oil pressure is at 50psi at idle. not famitier with this engine . is this a normal/abnormal reading. According to mitchell ther is...
1995 Chevrolet Tahoe 5.7L Poor Idle Quality VIN: 3GNEK18K0S
Customer complained about vehicle shutting off at idle before engine was changed. Vehicle does not cut off now but stumbles at idle when the AC is off only.
1996 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC1249T
Good evening to all the great techs out there in iatn land. Haven't had alot of time to look at above vehicle yet as it came in so late, but wanted to get some ideas from you all as where to possibly start. Here goes. Customer was driving vehicle along stretc...
1997 Chevrolet S10 2.2L no power VIN: 1GCCS1440V
Vehicle has no power on acceleration... No missfires are present... vehicle runs smooth ...just lacks power. Have compared vehicle to like model ( same trans/ engine ) This vehicle definetley lacks power... other S-10 leaaves this one standing still.Tech 2 dat...
1997 Chevrolet S10 4.3L headlights VIN: 1GCCS14W4V
customer came in said headlights on bright would go dim then bright. i tried at first but it didnt happen to me. come to find out the vehicle has to run for a while with the brights on to get it to do this..sure enough with the brights on, its like you are fla...
1999 Chevrolet Blazer 4.3L tranfer case VIN: 1GNCT18WXX
vehicle came in for 4 weel drive stuck in 4 hi. Switch no action no lights. Pulled fuse and replaced woke system up. Ck codes found code 2 tranfer case encoder motor fault.ck voltages at encoder motor 5 volts refs and power grounds all fine. Replaced encoder m...
1999 Chevrolet Blazer 4.3L Air Bag light VIN: 1GNDT13W3X
After replacing the temp door actuator and test driving vehicle, the air bag light came on and stayed on. Code B1036 in computer(discriminating sensor circuit open or short. I cleared the code and it came back on immediately. The scanner said code cleared succ...
2000 Chevrolet S10 4.3L Cuts out VIN: 1GCCT19W1Y
Well guys and gals heres one for you all. We have a 2000 blazer in the shop that shuts off while driving. Usually does not happen with the first start of the day. If you start it and drive 5 miles or 50 miles it runs fine. It happens when you shut it off and s...
2001 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC52451
Second post on this car. At this point, I'm lost. I can't catch the problem in the act. Now, car dies at random while driving as well as a very intermittent no start WITHOUT a check engine light at times. Wiggling the harness to the ignition module would kill ... Trouble codes: U1000
2002 Chevrolet Express 3500 5.7L Misfire, MIL Lamp on VIN: 1GBHG31R62
This van came in with compliant of check engine flashing, i get this beast in with no lights on at all hook up solis to get codes and po1o1 and p0300 in system( can't get it to happen to me! dont want to give van back just yet, would like some info on this! al... Trouble codes: P0101 (Mass air flow curcit out of range), P0300 (Random Misfire)
2002 Chevrolet Avalanche 1500 5.3L MIL Lamp on VIN: 1G134TD342
anyone seen this set up with ecm providing ground and not enough continuity to pull solenoid shut? I am leaning towards a bad solenoid , but during my tests I put 12v and ground to connections and solenoid works fine. bad driver? or will a weak solenoid refu... Trouble codes: P0440
2005 Chevrolet Silverado 2500 HD 6.0L brake pedal VIN: 456RSDF464
I'm having a problem with the brake pedal on this truck, the best way to describe it would be the brakes pedal sort of jumps a inch or so when applying the brakes hard. The vehicle can be in motion or even at a stand still, if you press the brakes hard the ped...
2005 Chevrolet Equinox LT 3.4L front wheels VIN: 2CNDL73F65
Vehicle has a high pitch noise when moving. It comes in about 25mph and stays there. It is not affected by turns or engine rpm. It is consistant with wheel speed. Braking does not deminish the noise. If put in neutral and left to coast, the noise would gradual...
1997 GMC Sonoma SL 4.3L No rear brakes VIN: 51501GTDT1
This truck every time that it comes in the shop has no rear brakes working at all(like no pressure), after we put all this new components trying to fix this problem, guess what? the problem still here! as far as we got we this, is that we put the unit on the l...
2000 Oldsmobile Alero GL 2.4L Remote Door Lock VIN: 1G3NL52T4Y
Hey Techs, A friend of mine replaced the battery in the remote with no success and then replced the remote and tried to reprogam the remote and system will not work. I am unfamiliar with the remote unlock system and was wandering if anyone could give me any u...
1991 Pontiac Sunbird LE 2.0L No Start VIN: 1G2JB54K3M
If I touch the distributor rotor shaft with screw driver with ignition key on the coil sparks, when you attempt to start you get one spark and then nothing, replaced ignition module as per diagnostic steps to no avail.
1999 Pontiac Montana 3.4L abs VIN: 1GMDU06E9X
Hi, I have this Montana in for ABS light coming on intermittently. On the road test I was able to pull a code C1236 System Low Voltage. I also noticed on scan data the ABS voltage would read 2.4V when this code is active. After clearing codes and restarting ve...
2000 Pontiac Firebird Formula 5.7L No Start VIN: 2G2FV22G5Y
This customer reports an intermittent no start , this conditioned had only occured a few times for her, we have not been able to duplicate. All pids look good, vehicle runs great , I have absolutely nothing to go on. I did however pull a po443 code under: 'tes... Trouble codes: P0443
2001 Pontiac Montana 3.4L Hesitation, Cuts out VIN: 1GMDX03EX1
This van acts like you are turning the key off and back on every second or so for 5-10 seconds, then clears out. Our Genysis has recorded several of these occurences and shows , cam, MAF, TPS, etc. all good. o2 sensors act like nothing has happened. The only t...
2003 Saturn Vue 3.0L dash cluster VIN: 5GZCZ63B73
hi, this saturn came to us with cluster issues, air bag light on, temp light on, low fuel light on, temp gauge stays in middle, fuel gauge stays on empty. speedo, tach and others lamps seem to work ok. found no codes in any module. tried battery disconnect but...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52K2V
Replaced fuel pump due to low volume and pressure on road test. This helped some with the idle issues. Removed and cleaned IAC.Performed idle relearn. Seems screws have a tendancy to break off in throttlebody. Both screws broke even with heat apllied to housin...
1993 Chevrolet Lumina Euro 3.4L Balance shaft VIN: 2G1WN54X4P
I got this car fixed right away with the responses I recieved, Thanks. In summary what I thought was a balance shaft was a dummy shaft LIKE ME, the timing belt was on wrong. The chain driven shaft that drives the oil pump (goes where cam shaft was in the old p...
1995 Chevrolet S10 4.3L Cuts out, Stall VIN: 1GCC519Z6S
thank you everyone who helped with their input. I found out that the vehicle has a leaky injector gasket, after replacing both injector and gasket, the problem still persisted, and more unrelated codes came up, so I am thinking of replacing the PCM. If this wo...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W1V
So far I've received 22 replies and the vast majority have hit the nail on the head. Gasoline was leaking from the injection assembly up into the wiring harness behind the throttle body. The only debate seemed to be whether the gas was being pushed through the...
1998 Chevrolet Express 2500 5.7L starting system VIN: 1GCFG29RXW
first of all ,let me say thank you very much to all the technicians who responded to my help request & provided me with great information on this problem.o.k after replacing ignition switch & passlock sensor van did fine for awhile but then it went back to a n...
2001 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC52451
Thanks for all your help. Read part 2 for more info as the car returned. I had many successful miles on it with a new PCM, but that was short lived. Trouble codes: U1000, U1016.
2004 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHK29144
Well as many of you suggested this vehicle was under warranty. The owner does not get along with the local dealer so he wanted me to make sure it was under the 100k powertrain warranty not an external problem such as a line leaking etc. We checked everything w...
1997 GMC Jimmy SL 4.3L No Start VIN: 1GKDT13W5V
thanks for all the replies even some smart a-- replies.those who said a ignition switch hit it on the head,vehicle runs and comes out of park like a new one thanks again to all the fixes.
1998 GMC Jimmy SL 4.3L heater VIN: 1GKCT18WXW
Well I don't what to do with this. I have 2 replys of broken doors in the heater case and a guy from Delphi that said it's normal. At this time we are going to do nothing since it's getting cool and see if it gets worse. I will check other Blazers as they come...
1995 Oldsmobile Cutlass Ciera 3.1L Hesitation, Cuts out, Stall VIN: 1GEAJ53M5S
Thanks to everybody who replied, especially Bob [...]'s advice and we monitored the vehicle reference and it did glitch out at times, but it was very hard to find. Also, we discovered that there was a loose wire on the computer for the Cam ... Trouble codes: P0341.
1997 Oldsmobile Aurora 4.0L alternator VIN: 1G3GR62C7V
Thanks to everyone who replied! I'm a first time user and very pleased with the responses and accuracy of input. In short, thermistor fixed the problem. I was following Shop Key/Mitchell in the beginning which told me 'L' terminal red wire should be hot with k...
1997 Pontiac Sunfire SE 2.2L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Poor Fuel Economy VIN: 1G2JB1241V
first off, thanks to all who offered help. as of the present, my customer picked up the vehicle 'to try it out'. i will say, it is running much better than when brought in.i still have an intermittent miss, primarily on 3 and 4, but sometimes on 1 and 2. the f...
1998 Pontiac Trans Sport Montana 3.4L Air Bag VIN: 1GMDX03F2W
Hello, we cleaned the connections to the seat belt buckle. Problem is fixed. Thank you
1998 Saturn SL1 1.9L vent solenoid VIN: 1G8ZH5287W
I would like to thank everyone who has sent a reply. Everything that was sent was a help. I am going to check everthing that was recomended as soon as the customer will find it in his schedule to return. thank you agein.
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