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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 26, 2004
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Open Help Requests for GM
Help Request Answers
1988 Buick LeSabre Custom 3.8L No Start, Stall VIN: 1G4HP54C4J
The vehicle came in as a no start. Checked injector pulse,no pulse, pulled a plug wire to see if there is spark. Sparked once and then vehicle started and ran. Drove and it died Same symptoms,everytime you go to check spark it will spark then run. The vehic...
1999 Cadillac Catera 3.0L MIL Lamp on VIN: W06VR54R0X
Vehicle came in for MIL light being on. Found codes 171 and 174 (Fuel system lean bank 1 and 2). Engine runs good, no driveability complaints. Did fuel injection service, no vacuum leaks, air injection working properly, fuel pressure was at 45psi specs was 40 ... Trouble codes: 171 (System too lean bank 1), 174 (system too lean bank 2)
1988 Chevrolet G30 Hi-Cube 5.7L rear brakes VIN: 2GBHG31K7J
This bus came to us in may of 2004 with the complaint of loss of brake fluid and brake pedal fading to floor. We replaced the master cyl and did front and rear brakes turning drums and rotors but did not replace wheel cyls at that time. Vehicle came back in Ju...
1995 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W3S
Vehicle has intermitten no start. When vehicle won't start, I do not have injector pulses. Every time vehicle won't start, check for codes, has code P1351, can clear code and vehicle will then start. Followed trouble shooting chart for P1351, said to replace i... Trouble codes: P1351 (EST Output High or Pulses Detected when open.)
1996 Chevrolet C1500 4.3L very long crank time VIN: 1GCEC14WOT
truck started and ran fine from parking lot to shop customers complaint long cranking times in morning. i started truck several times with no problem. after installin pressure guage at fuel filter fuel pressure of course dropped to 0 while cranking engine afte...
1996 Chevrolet K3500 Cheyenne 6.5L tcc lockup VIN: 1GCHK39F5T
This 4L80-E comes in and out of lock up whenever it likes - but it has to be driven up above 70MPH before it acts up, any slower speeds it's ok. Trans shop brought it in couple of weeks ago with new trans and EPC was not working after, the PCM was burnt up. Re...
1998 Chevrolet K2500 Cheyenne 7.4L F/P runs w/key off VIN: 1GCGK29J7W
I have looked in the archives,and in Mitchell for TSB's and for normal operation of the fuel pump on this vehicle and didn't find anything.This MAY actually be NORMAL operation on this vehicle but I do not remember ever having another do the same thing ??!! Wh...
2001 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEC19VX1
Vehicle acted up & died on highway for customer. Towed in. Could get to run with throttle open (severe miss mostly on 7 & 8)but will not idle. pulled plugs had bosh double plat that were fouled also had bad wire on #3. replaced plugs @ wires still has same pro...
2004 Chevrolet COLORADO 3.5L sir light coming on VIN: 1GCDT13634
Hello techs, A good customer of mine purchased a new drivers seat and asked if i would install it. The seat is a Recaro and the mounting bracket/set track was custom made by speedware motor sports. The problem i'm having is that the OE seat has a SIR sensor on...
1991 Geo Metro 1.0L Low vacuum VIN: 2C1MR2466M
Hello everyone and help. I have this 91 Metro of my own that we rebuilt the engine on and it runs poorly at idle, lacks some power and struggles to get 12 to 13 inches of vacuum at idle when the timing is set to 6 degrees as specs call for. The vacuum needle ...
1989 Pontiac 6000 LE 2.5L Surge, Cuts out, Stall VIN: 1G2AF51R7K
when engine temp is below 60 degrees, when accelerating to about 1/4 throttle the engine will either stall with a pop through throttle body or cut out revving from 1000 to 2500. as soon as the temp of the engine reaches 60-62 degrees f. it will run perfect. th... Trouble codes: 42 (est problem)
2001 Pontiac Grand Am SE 3.4L anti-theft enabled VIN: 1G2NF52E7M
I could use some input on this one. It came in crank, no start. The anti-theft disabled the injectors. I did the reprogram and it started fine. I'm wondering what set it off in the first place...I'm thinking the magnet in the ignition switch, but can't get the...
2001 Pontiac Grand Am SE 3.4L turn signals, hazards VIN: 1G2NF52E21
When using the turn signals or hazards there is a constant clicking noise after you turn the signals or hazards off. The lights in the dash for the turn signals don't flash, you only get the clicking noise.
2000 Saturn SL1 1.9L Excessive Emissions, fails nox VIN: 1G8ZH5283Y
emmisions readings given are for 15mph, 25mph, NOT idle,cruise, cylinder 4 seems to be suspect misfire although not setting code for that specific cylinder Trouble codes: 0300 (multiple misfires)

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L starter VIN: 2G4WB52KXX
Thank you to all who replied. I had a few replies that told me to pay attention to the battery although I had already tested it, not wanting to make a simple mistake, I cleaned the post and also checked the positive post for acid drips and condition of posts, ...
1984 Chevrolet Corvette 5.7L overdrive VIN: IGIAY07877
hello everybody thanks for the replies every reply mentioned the switch as a problem area and as the easiest to get to we joined the wires together so the switch was effectively on all the time. the customer has driven the vehicle and the fault has not reoccur...
1987 Chevrolet P30 Step-Van 6.2L No Start, Hesitation, Stall VIN: 1GCJP32J4H
Sorry it took so long to fix this thing, but I've had a bunch of other work come in and since this guy wasn't in a big rush, I put it off until I got caught up. I must have needed a couple days off from it because 10 minutes after starting to work on it yester...
1995 Chevrolet K2500 5.7L Poor Idle Quality, Hesitation, Surge, Stall VIN: 2GTFK29KXS
Thanks to all that replied on this one . Had 29 helpful ideas. Put an EGR valve on it and haven't seen it since . Customer is one of those that likes to buy and install his own parts . Just wants you to tell him whats wrong .
2000 Chevrolet C3500 7.4L No Start, Cuts out VIN: 1GBKC34JXY
I want to thank the guys that took time to try and help me with this problem. All posts got me thinking back into basic terms and in the long run solved this problem. It turned out to be a green ground strap above the fuel tank that did not show up on a wiring...
1990 Oldsmobile Cutlass Supreme SL 3.1L Stall VIN: 1G3WS54TXL
all those who said crank position sensor were right its been a week all is ok with that one thanks to all replies
2000 Oldsmobile Intrigue GLS 3.5L Steering Angle Sensor VIN: 1G3WX52H9Y
All replies suggested the steering position sensor was at fault. Indeed it was. Replacing the sensor and centering the steering with the tech 2 cured the code 710. THANK YOU!!
1984 Pontiac Fiero SE 2.5L Clutch VIN: 1G2AF37RXE
Sorry for the delay in closing this, but I wanted to close this after the customer paid for this and the car had left the property (hopefully we will never work on it again). I want to thank everyone for their help on this nightmare of a job. Thanks to Randy [...]...
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