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Prev Professional Automotive Repair Technical Discussions for May 27, 2004
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Open Help Requests for GM
Help Request Answers
1990 Cadillac Brougham 5.7L "Anti Lock" light VIN: IG6DW5473L
Hello All Cadillac experts, We need help. We have a Cadillac Brougham Elegance car of 1990 and this car is fitted with Bosch System with 2 front speed sensor and 1 rear speed sensor. ABS registered code no. 12,21 and 25. We think the a/m codes are:- Code 1...
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1996 Cadillac Fleetwood 5.7L air conditioning VIN: 1G6DW52P9T
Hello and good morning. I have this limo that won't blow cold. The low side pressure was up around 55, so I evacuated the system to see how much 134 was in there. It showed about 4.5 pounds, which I figured to be about normal for a dual a/c limo. next I tried ...
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1998 Cadillac Seville STS 4.6L programing failure VIN: 1G6KY5490W
Help!! Calling any Caddy programmers out there. While trying to reprogram the ECM with my Tech-2, the download to the car was about 50% done when all of the sudden the display showed up several, (13 I think), error messages and the message "Programming Faile...
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1987 Chevrolet R10 Custom Deluxe 5.0L Stall VIN: 1GCDR14H2H
Have a typical home try to fix and then take it to the shop.We have tryed to reset the base idle,checked the timeing and is very erratic. Found the TBI base plate gasket leaking and replaced it. Tried to replace ign module and iac motor and no change. The loca...
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1996 Chevrolet Express 2500 5.0L MIL Lamp on VIN: 1GCFG25M3T
hey all got one doesn't make sense can't figure what i've missed?sets cmp crk correlation code after warm gets worse longer runs.acm retard set at zero above 1000 rpm and stays above 1000 climbs when accelerated drops back to zero within a sec or 2 max.have ch... Trouble codes: P345
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1996 Chevrolet K1500 Cheyenne 5.0L No Start VIN: 2GCEK19M7T
I thank you all again for taking the time to read this post. Any imput would be greatly appriciated. O.k... first things first, customer had called me and complained that his truck would start but when put into gear the vehicle would cut out. Then gradually i...
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1996 Chevrolet Beretta 3.1L No Start, Stall VIN: 1G1LV15M0T
This auto first come in sluggish at low speeds but when rpm reached about 2000 + the engine took off strong. Then it reached a point that it ran good cold but would just shut off after driven far enough to get it warm. Now it won't start. We lost ignition but ...
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1997 Chevrolet Astro 4.3L speedometer VIN: 1GNDM19W9U
This astro was towed to my shop 1 month ago for a no start. The owner was driving it when she said the speedometer quit working then the motor shut off. I tried hooking up GENISYS and no communication. After running a few test i replaced the computer. Found ou...
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2000 Chevrolet Silverado 2500 6.0L compressor belt
This truck arrived at our shop with a broken Compressor drive belt. Customer states that belt had been recently replaced at a dealership while he was on the road. Belt is broken cleanly, with no signs or slippage or wear. I belive that recently saw a post that...
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1991 Geo Storm 1.6L Poor Idle Quality, Cuts out VIN: J81RT2357M
hay guy i have this geo here with a bunch of codes i clear same codes come back the one that i dont like is code 51 e.c.m prom error this car dont have a prom could this car have that many sensores going bad at once any help on this car i thank you allso is th... Trouble codes: 14 (c.t.s high temperature), 13 (oxygen sensor), 21 (t.p sensor signal voltage high), 23 (mat sensor low temperature undicated), 32 (e.g.r system fault), 51 (e.c.m prom error)
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac Escalade 5.7L Hesitation, Stall, Misfire
Don was dead on the money.I had proper fuel pressure but not enough volume. I could hook my fuel pressure tester up and bled pressure off while the truck was running ,this would kill the engine. Installed a new pump assy.Truck runs like new again. Thanks f...
5
1973 Chevrolet monte carlo 350CID Air conditioning VIN: 1H57H31632
Thanks to all that offered wiring diagrams, the problem was corrosion in power wire to the compressor. repaired the wiring, and all is well. Thanks Again Craig
5
1990 Chevrolet C1500 Cheyenne 5.7L MIL Lamp on VIN: 2GCEC14K8L
Thanks to all who offered help. The base timing being set to about 12 degrees btdc fixed it, but I also drained the fuel tank and refilled it with 87 octane. Base timing is supposed to be 0 degrees. The truck has tons of power now and no mil. Trouble codes: 43 (Problem with ESC Module).
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1993 Chevrolet K2500 Cheyenne 6.5L No Start VIN: 1GCGK24F1P
I'm gonna close this post for now, 'till truck comes in. Most replies lead towards injection pump, so that's were we'll start. Thanks for the replies.
6
1995 Chevrolet Astro CL 4.3L Poor Idle Quality, Stall VIN: 1GNDM19W2S
hello to all and thanks for your help,The fix was to replace the cat converter. The entrance of the converter looked fine but the rear of it was broken in half internally and had turned sideways so the flow out of it was blocked. After replacing, I went on a t...
7
1996 Chevrolet Caprice Classic 5.7L line pressur VIN: 1G1BL52P8T
Howdy Doody, Well I got some more schoolin, Had a few replies about limp mode and commanded high line pressure. But when I tore down the unit I thought maybe the torque signal was leaking around the reverse boost sleave due to a slight grind mark in the bore t...
3
1997 Chevrolet K1500 Suburban LS 5.7L trans. case VIN: 1GNFK16R8V
I did check the transfer case output shaft retaining clip, was in good shape and not any significant play. We are going to replace the front actuator with the updated design and see if any improvement. The customer will not be able to bring back for awhile so ...
9
2001 Chevrolet Corvette 5.7L pinging VIN: 1G1YY22G71
THANK YOU ALL FOR THE INPUT BUT THE REAL FIX WAS TO REFLASH THE PCM WITH A NEW CALIBRATION. THIS IS WHAT HOPPEN I USUALLY GO TO THE GM CALIBRATION WEBSITE TO SEE IF THERE IS ANY NEW CALIBRATION TO CORRECT MY PROBLEM BUT WHEN I WENT THERE I DID NOT SEE ANYTHING...
6
1997 GMC K3500 Sierra SL 6.5L 4th gear VIN: 1GTHK33FXV
to all who sent me help I wish to thank..this was a difficult one to diagnose untill we got to the root of the problem..we were thinking all the time this was an electrical problem when in fact this was mechanical all along..as I stated in my help request this...
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1999 Oldsmobile Cutlass GLS 3.1L turn signals/headlamps/wipers VIN: 1G3NG52M4X
Thanks to all who replied to our request and suggested we check the ground circuits of the system. We found ground splice pack g201 inside the vehicle and it was ok so we started at the relay center and traced circuits back up to switch. It wasnt that the circ...
3
1998 Other GM H1 6.0L Out put flange, left VIN: 137ZA8434V
A special thanks to ALLAWD for the following information There is a spline seal under the nut that holds on the drive flange. You can get a new one or use a little RTV on the old one. I highly recommend replacing the Nord lock washers and the bolts that conn...
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