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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 25, 2006
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Open Help Requests for GM
Help Request Answers
1993 Buick Park Avenue Ultra 3.8L supercharger VIN: 1G4CU5310P
Good afternoon, I have a noisy supercharger at idle. SC was replaced with used unit however noise is still there. There is a code 43 esc module, knock sensor. Noise is definitley coming from SC, with belt removed noise is gone, all idler and tensioner pulleys ...
1987 Cadillac DeVille 4.1L Poor Idle Quality VIN: 1G6C05155K
Computer been replaced on this vehicle and now need to relearn idle settings. I know there is a way by jumping green connector near alternator to ground some minutes and do some other things with no need of a scanner. But I lost my information and my iatn acco... Trouble codes: E030 (isc control)
1999 Cadillac Seville STS 4.6L Keyless Entry VIN: 1G6KY5495X
Need to know if there is a way program the keyless entry manualy, for a 99 Cadillac STS.
2000 Cadillac DeVille 4.6L magnasteer system VIN: 1G6KD54Y9Y
Dear Mr Goodwrench, I have a Cadillac that has a loss of steering assist in parking lots trying to turn left or right into a parking space. We have had little rain so water and/or a slipping belt doesn't apppear to be an issue. There are no codes in ABS,Tracti...
1985 Chevrolet Corvette 5.7L Hesitation, MIL Lamp on VIN: 1G1YY0783F
first i would like to thank all who take the time to reply. i know by looking at related history, you're all going to say good luck. but actually i'm almost there. got it running and now the only thing left is this code 33 for the maf sensor. my local gm conta... Trouble codes: 33 (maf sensor signal voltage high)
1992 Chevrolet Astro 4.3L No Start, Stall VIN: 1GBDM19ZXN
Hello all, Problem started three weeks ago. It would stall on decel and not restart. Banged on the fuel tank and it started. Replaced fuel pump. That lasted about a week. Banged on the tank again it started. Replaced fuel pump and sending unit. Ran fine. That ...
1992 Chevrolet S10 Blazer Sport 4.3L No Start, blowing fuses VIN: 1GNDT13W8N
The story...Lower ball joint broke on drivers side 45 miles from here. A shop replace the ball joints and took the vehicle on a test drive on "fried" the computer. Long story short, several computers had been tried and various components replaced, still killin...
1995 Chevrolet S10 4.3L Poor Fuel Economy VIN: 1GCDT14Z1S
strange problem. truck idles and runs smooth. o2 sensor functions properly up to 2000 rpm then drops off to low number around 63 and crosscounts stop altogether. fuel economy has dropped significantly. all other readings normal. do not have an exhaust anylizer...
1996 Chevrolet S10 LS 4.3L readiness monitor VIN: 1GCDT19X2T
Hi thanks in advance, This S10 Pu has 3 not readies. We have been fighting this for about a month now. Intermittantly the MIL will come on so the customer will unplug the battery. the code is always a heated O2 code, cant remember which but all 4 O2's are new...
1996 Chevrolet Tahoe 5.7L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2GNEK18R9T
tech's need some help installed new rebuilt engine. my question is regarding code p1345 ckp/cmp correlation problem, recheck dist. installed right yes, could the tone ring on the crank be installed backwords it does have a key on the crank. vech misses real b... Trouble codes: P0300 (ramdom missfire), P1345 (crank/cam correlationproblem), P0135 (02 heater ckt bank 1 sensor 1)
1998 Chevrolet Express 1500 5.0L transmission VIN: 1GBFG15M8W
at about 48mph there is a shutter that feels like you are going over a rumble strip on the side of the road.it come a goes every 15 -20 seconds.any help would be appreciated thank you in advance.
1998 Chevrolet S10 LS 2.2L Rediness Monitors VIN: 1GCCS1949W
This vehicle came in for Emission Test Failure. CMP Failure code P0342 and Rediness Monitors Catalyst and Evap Not set. Code was easy, defect cam shaft pos sensor. Replaced, MIL off after 2 starts. No other codes or pending. Ran Drive Cycle 3 times with cooldo...
1998 Chevrolet Camaro 3.8L wipers,parking VIN: 2G1FP22KXW
This Camero parks the blades straight up. I remember seeing something about a parking paw or something getting out of place or breaking but I really don't remember. Car isn't here till I think I know what I'm doing. I hope somebody can tell Me what I will be d...
2000 Chevrolet S10 2.2L security,abs,airbag,seatbelt,batt,fuel lites on da VIN: 1GCCS1951Y
Hello again, This S10 came in with multiple dash warning lites on intermittently.Have searched MOD bulletins and IATN but no help there. The AbS lite,security lite,the airbag lite,the fuel lite,battery lite,seatbelt lite, but no CEL. Checked codes and the on...
2001 Chevrolet Blazer LS 4.3L tailgate wont release VIN: 1GNCS13W71
Customer went to open rear tailgate/glass, heard a thunk and now cant open. The glass must open first from the push button outside, then you can lower the tailgate. This is not a keyed system. We have all electrical components working. You can hear the latch m...
2003 Chevrolet Monte Carlo SS 3.8L none VIN: 2G1WX12K33
security light flashes, car still runs,I believe this mean that the system is in op, check fuses OK,? not sure were it is, so chk all, left and right side of cockpit, and under hood, all OK. if some one can enlighten me on this system and what to check and tes...
1994 GMC K2500 Sierra SL 6.5L MIL Lamp on VIN: 2GTFK29S1R
Hello, I have this k2500 with a 6.5 turbo in it and it sets code 33 for the egr barometer low voltage. I tried to use my mastertech scan tool to diagnose as per the trouble shooting tree. All i can see is egr duty cycle and it is 66% at idle. The problem im ha... Trouble codes: 33 (Egr barometer low volt)
1995 GMC G3500 Vandura 5.7L Poor Idle Quality, Stall VIN: 1GDKH32K8S
I have a 5.7 liter TBI engine that has a driveability issue. The idle is very lopey but smooths out off idle. Occasionally when you come up to a stop sign, The lopey idle will cause it to stall. It always restarts fine. There are no codes present. I checked va...
1996 GMC Yukon SL 5.7L No Start VIN: 1GKEK13ROT
Thanks in advance
2000 GMC Sierra 1500 SL 4.8L Surge, MIL Lamp on VIN: 1GTEC14V5Y
This 4.8L engine has no driveability problem but at cruise a misfire count starts on cylinders 2, 3 & 5 with #3 the highest count which causes the mil to come on. It has 0 count at idle. I have changed the coil, plugs, and wires and cylinder #3 injector and fo... Trouble codes: P0300 (Random Misfire-cyl 23 5)
2001 GMC Sierra 2500 HD SL 6.0L Alternator, PCM, Wiring VIN: 1GTHK23U31
The vehicle has a code P1637, The battery indicator illuminates intermittently in the cluster... but the alternater is always charging... I looked in Mitchell for information about how the system works but I don't find usefull information... They make me test...
1992 Oldsmobile Cutlass Supreme S 3.1L No Start, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1G3WH14T1N
vehicle not running properly has miss, and under heavy acceleration vehicle bogged/no power, drove car next day and it stalled and would not restart customer says it had good spark. when the car did start it ran poorly,blue and black smoke from tailpipe. we ha...
1993 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HY5316P
my biggest problem is that i cant find info on the code 99 all powers and grounds into ecm checked ok some sensors work ok at random im pointing to the ecm but not having anthing on the code 99 im having doubts so any info on that code or if you've had this pr... Trouble codes: 99 (power management problem), 69 (high pressure switch circuit), 68 (cruise cont. command problem), 65 (cruise cont. servo position sensor), 67 (faulty cruise sw.), 66 (ac pressure sensorcircuit problem)
2001 Oldsmobile Alero GX 2.4L anti theft system VIN: 1G3NK12T01
Hello group and thanks for your time. This Olds Alero has been a problem for quite a while. It came to me after the dealer through up their hands. The vehicle will intermittantly not start and have to be towed in. Cranks, no start. Code p1632, Anti theft alar...
2004 Pontiac Grand Prix GT1 3.8L 1-2 shift solinoid VIN: 2G2WP54264
Gentlemen, I've got a great one for all the GM wizards out there. Customer was jump starting a car with a Very dead battery. Needless to say they didnt get it started but driving away they realized it wasnt accelerating very fast. When I got it into the shop i...
2001 Saturn SC1 1.9L monitors wont run VIN: 1G8ZP12861
hello, we have this saturn here thats due for NYS inspection. it had an EVAP leak code in it, we replaced the vent solonoid, and now we cant get all the monitors to run. Customer drives the car every day, shes had it for 3 weeks, the EVAP monitor ran, which is...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Reatta 3.8L touch screen VIN: 1G4EC11C8J
Mystery solved. The problim turned out to be power related. The touch screen is called the graphics control center (gcc). It receives aprox 120 volts from the CRT control center (crtc)via a dedicated two wire connector that plugs into the crtc. The crtc handle...
1997 Chevrolet Corvette 5.7L back up lights VIN: 1G1YY22G7V
Thanks, everyone for the help, I found that someone had pinched 3 wires when they changed the clutch on this car, I repaired the wires and everything is working fine. I was reading the wiring diagram wrong. Here is how it works, when the car is put into revers...
1997 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCEC19W8V
thanks to all who replied ... it was the engine 1 20 amp fuse. it wasn't just blown it was missing. iatn rules! thanks again james. Trouble codes: P0102, P0340.
1999 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy VIN: 1GTHG39R8X
Thanks to all techs, problem was pcm, split open on side, and connentor (white) corroded. Installed used one, got reflashed and programmed for antitheft key, ok since. Many techs suggested ecm/vcm, other suggestions were, common volt source to affected sensors... Trouble codes: P1121, P0102, P0123, P0141, PP034, P0161.
1999 Chevrolet Blazer 4.3L battery drai VIN: 1GNDT13W1X
Lots of great replies and thank you to all that did. Apparently OEM type scanners for gm according to one tech will allow you to check for parastatic drain. As another tech said, with all the modules trying to go to sleep, its just about impossible to check fo...
2002 Chevrolet Silverado 2500 HD 6.6L drive belt VIN: 1GCHC23122
Well the fix for this came from Randy in Georgia. The new updated bracket and making sure the pump gear was flush was the fix. Thanx to all who relied.
1998 Pontiac Grand Am GT 3.1L ETS Light On VIN: 1G2NW52M2W
The best tool once again pulled me out. I would like to give a secail thanks to Jason from Minnesota. There really is no good explanation for the fix except that there broken wires in 2 spots under the center council. Thanks to everyone who responded to my pos...
2002 Pontiac Grand Am SE1 2.2L fuel pump VIN: 1G2NF52F32
we believe that we originally cured the problem by replacing the lock cylinder, although after repeated attempts to start the oe battery failed and was dropping to 8 volts when trying to start. we replaced battery and customer has been gone for a week without ...
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