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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 1, 2007
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Open Help Requests for GM
Help Request Answers
1994 Chevrolet S10 LS 4.3L abs codes VIN: 1GCDT19W9R
Ok, I,m confused on this one. ABS light comes on. Pulled out snap-on scanner and programed it. Basically the only thing it does for you is flash codes on the dash,and then you can earmark them. The problem is the code list on snappy scanner lists code #s 1 thr...
1997 Chevrolet Tahoe 5.7L No Start VIN: 3GNEK18ROV
i have a problem! 97 tahoe will not start. have great compression, have good spark, good fuel pressure. installed new crank sensor because there so common. checked fuel volume it was also good. installed updated injector assemble still nothing. any help would ...
1998 Chevrolet Blazer 4.3L gauges,warning lights VIN: 1GNDT13W4W
This vehicle was towed in for a no start.As usual more times than not,it started right up in the parking lot.After checking all the usual things,(fuel pressure,codes,etc)I sent it on it's way not being able to duplicate the complaint.That was about 4 months ag...
1999 Chevrolet C1500 Suburban 5.7L door locks VIN: 3GNEC16R4X
this vehicle the door locks work one first try and after that you have to wait a few minutes and locks work only once and you have to wait,like something is heating up or voltage breaking down so i replaced door lock relay and this did not cure problem checked...
2000 Chevrolet Tahoe 5.3L Dome lamps, compass/temperature display VIN: 1GNEK13291
This is a vehicle that the customer has just purchased from a used car dealer. When purchased the compass and temperature display on the mirror and the overhead map lights were inop. I checked the bulbs and they were good. I checked for power and there is no p...
2000 Chevrolet K2500 7.4L lack of power VIN: 1GCGK23J2Y
has anyone seen this before? i am stumped. all details are mentioned above. please help. i should also mention that there is alot of spark knock when problem occurs, according to scanner pcm starts retarding timing accordingly. all other data looks ok. i did n...
2000 Chevrolet Malibu 3.1L engine VIN: 1G1ND52J2Y
Car was towed in. Died when customer was driving. No codes were retrived from computer.Fuel pressure at 55psi and we have good spark at the plugs. Showing RPM from the crank sensor and have replaced cam sensor.Spark plugs look wet with fuel but when trying to ...
2000 Chevrolet S10 4.3L Poor Fuel Economy, MIL Lamp on VIN: 1GCCT19WXY
About a week after the fuel pump was changed the check engine light came on without any driveability symptoms. Customer has been living with it but now wants it fixed. When the mil came on, at first it was intermittent and now it stays on all of the time. I he... Trouble codes: P0446, P0452, P0453
2001 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J91
HEADING Has anyone ever seen the oil pressure switch short out the bus line and not start the vehicle.The vehicle returned after we repaired the fuel pump for a no start condition on Jan. 24. found fuel pump bad and replaced. Customer has returned vehicle and ... Trouble codes: P1189 (oil pressure circuit returned), U1040 (bus code returned), P1626 (theft history never returned), P0452 (evap history never returned), C1255 (abs history never returned), U1000 (bcm returned)
2001 Chevrolet Express 3500 5.7L Poor Idle Quality VIN: 1GCHG39R11
this poblem is very intermittent. doesnt matter if van is cold or warm.when started may idle at base idle or may idle at 1800 rpms.with scanner plugged in on function test for iac. iac does not move to commands. cycle key with 10 to 20 second intervals will st... Trouble codes: P0506, P0507
2003 Chevrolet Trailblazer North Face 4.2L battery VIN: 1GNDT13S53
hello everyone i have a 2amp draw on the battery when the car is off. this draw will be there for about 5 min.and then goes away for about 1 min. and comes back.it does this over and over until it kills the battery.if i pull fuse #6 in the under the rear seat ...
2003 Chevrolet Suburban 1500 LS 5.3L passenger side bottom heated seat VIN: 3GNFK16Z43
hey there everyone , i have had some trouble with this one. The passengers back rest heater works and both of the drivers side do too. when you push the button to activate the lower and upper on the passengers side the heat indicator buttons flash and the memo...
1999 Geo prizm 1.8L daytime running lights VIN: 1Y1SK5284X
This is an ongoing problem.The first trip in the complaint was the front parking lights stayed on &the blue high beam indicator was always on key out still on next am&burning smell &smoke from dash that had subsided by the time the car came in.Checked the 4pag...
2000 GMC SCHOOL BUS 7.2L starter VIN: 1GDG7T1COY
This 2000 GMC bus chassis intermittantly doesn't crank. I have checked power at the starter solenoid when in the crank position and there is none. I have replace the ignition switch and bypassed the neutral safety switch with no change. Is there a relay somewh...
2001 GMC C7500 8.1L no acceleration VIN: 1GDM7H1E71
Good morning and welcome to my nightmare. Truck was brought in from a shop that does most of it's own work, and given to me to fix after he gave up. This truck will not accelerate when you step down on the pedal"it just idles" I scanned for codes and and came ... Trouble codes: P1515 (throttle range error), P0405 (egr)

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac DeVille DTS 4.6L gauges VIN: 1G6KF54951
OK, this problem went away while charging battery. The gauges came to life and no more problems were present. Customer states it will probably happen again in 4 to 6 months. Customer also stated it was at the Cadillac dealer 4 times while under warranty but wa...
1996 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W3T
Vehicle was sent to a dealership where they replaced the connector to the ignition control module, even though I found less then .4 ohms resistance the new connector made the vehicle work. So some how when the connector is bad the VCM sends excessive voltage t... Trouble codes: P1351 (I.C. Circuit high voltage).
1997 Chevrolet Blazer 4.3L engine VIN: 1GNDT13WOV
Thanks for all the help. We replaced the engine with a used one with correct vin 'W'. A good example of better safe than sorry. Thanks again
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1945V
Thanks for all the help. It turns out that the coil was bad. In the morning it wouldn't produce a strong spark. Replaced the coil and double checked this morning and it worked fine. Thanks again. Mike Trouble codes: P0300.
1999 Chevrolet Blazer 4.3L timing chain VIN: 1GNDT13WGX
thanks for all the thoughts from all of you. a few i had knew but several that helped me for future troubles. as of now the shop is to busy to work on owners. since original posting i have had the occasion to drive it and i agree its not a chain issue. it make...
2001 Chevrolet Impala LS 3.8L radiator fans VIN: 2G1WH55K01
Thanks to everyone who replied. This seems to be an issue that happens quite often on the 2001 Impala models. We replaced the thermostat with a new Delco unit and we tried it for 4 days in a row. Everything worked correctly, but since the problem was intermitt...
2001 Chevrolet Cab & Chassis Silverado 3500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBJC34U21
Thanks for all the helpful info.I located the knock sensor wiring harness coming out the back of the intake manifold.I tapped into the wire for the rear knock sensor with a digital voltmeter using the AC voltage scale, started the engine and saw no change in A... Trouble codes: P0171 (p0174-), P0174 (p0300-), P0300 (P0332- Bank 2), P0332 (Bank 2).
1998 GMC C1500 Sierra SL 5.7L fuel leak VIN: 2GTEC19R8W
we replaced #2 injector. the leak in now gone. thank for all the help.
1999 Oldsmobile Intrigue GL 3.5L crank chain sproket VIN: 1G3WS52HXX
I was not able to find out why my crank chain sproket keyway kept stripping since all related components turned freely, the engine has now bent valves and I am replacing it as an assembly with a used unit. I lost a lot of money on this job 'be aware of the GM ...
2000 Oldsmobile Bravada 4.3L power seat VIN: 1GHDT13W2Y
i have not fixed seat problem yet. the one reply i got said seat module was under seat which i knew aready.after gathering more info it turns out only a tech 2 will read seat module info and i do not have one. i will have to sent customer to dealer. i could re...
2002 Oldsmobile Alero GX 2.2L brake pads VIN: 1G3NK12FX2
HI Techs, I thank you for taking the time to help me. I knew about the brake pads being installed incorrectly and I asked the driver if she rides the brake pedal and she said no,also she just drives back and forth to work with the car,no paper deliveries or an...
1999 Pontiac Grand Am SE 2.4L Rear Brakes and ABS light VIN: 1G2NE52TXX
Hello guys thanks for the replys. I fixed the vehicle by installing another used abs controller and manually bled it while installing which seemed to get all of the air out of the system. All the lights were out and the brakes worked well. My bleeding process ...
2002 Pontiac Grand Prix GTP 3.8L Accessories VIN: 1G2WR121X2
Well this one is ended up being the heads up display module. Customer didn't want to spend $500 plus to fix. Thanks for the input.
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