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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 22, 2004
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Open Help Requests for GM
Help Request Answers
1994 Buick Skylark Custom 3.1L Hesitation, Stall VIN: 1G4NV55M4R
Goodmorning all! I have this Buick that will start and run for about 5 to 10 seconds and than die. If you pump the accelerator rapidly, after it starts it will continue to run but if you hold it open steady it will eventually die. I have swapped out the MAP, O...
1999 Cadillac Seville STS 4.6L Cuts out, Stall VIN: 1G6KY549XX
Greetings fellow techranics and mechnicians. Most of the hair of this vehicle owner (a technician) has been removed over this one. Randomly, vehicle will stall (cut out). Instrument cluster goes black for about 5 seconds and then it will restart and run fine f...
2001 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y71
car purchased at auction came in apart put all components back on car check all fuses good have no power at aldl connectors no codes retrieved yet have good battery and grounds power out of ignition switch... can i get a place to start... please help...
1994 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Surge VIN: 1GNDT13W3R
Here is a good one guys. I'm helping a friend with this. Sometimes this thing runs great, sometimes falls on it's face. It's got a new fuel injector in it. Fuel pressure drops before the injector to approximately 40 PSI. My guess is a problem with fuel deliver...
1997 Chevrolet Astro 4.3L Surge, Misfire VIN: 1GNEL19W6V
I'm missing something obvious here, please tell me what it is; Here's the condensed story... vehicle came to us with coolant in the #5 cylinder, pulled the head and found a large crack in the cylinder wall. Now has a NEW 4.3 GM engine and has an irritating sur...
1997 Chevrolet Blazer 4.3L Fuse #2 VIN: 1GNDT13W5V
Vehicle will kill a battery after a day. Check for power draw after battery replaced. With my DVOM in between battery cable & positive post on battery I have 172ma draw with doors shut, key off & no visible lights on. If I remove the #2 fuse, draw goes to 9ma....
1999 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GTEC19T0X
Vehicle came in running great, check engine light on for inspection.Codes P0171 & P0174. Cleaned injectors and MAF, cleared codes and passed drive cycle, inspected. Returned MIL on. Replaced filter, 48 PSI on fuel system. Tried MAF, no help. Replaced fuel pump... Trouble codes: 0171 (System lean bank 1), 0174 (System lean bank 2)
2001 Chevrolet Impala LS 3.8L low coolant indicato VIN: 2G1WH55K31
Hi all, The low coolant indicator came on in this car the other day. The coolant is full. I looked for a sensor, but could not find one in the radiator--In fact, you can't even see the radiator tanks from either the top or the bottom of the car. Does anyone k...
2002 GMC Envoy SLE 4.2L Windows, Door Lock VIN: 1GKDT13S12
Nothing in the passenger door works! Power window, Door locks, power mirror. Checked for BCM codes with Tech 2, scanner says " no communication" for Passenger door module! Driver's door module does communicate! No codes for that module. Everythings works ok fo...
1994 Oldsmobile Cutlass Supreme S 3.1L Interior Lights VIN: 1G3WH55M2R
The interior lights will not turn on unless you have the key in the ignition and the key turned on. Vehilce also ahs a draw on the battery. Traced the draw down to the #13 fuse ELEC circut, which runs the interior lights and a few other things. We see nothing ...
1994 Oldsmobile Cutlass Ciera 3.1L Stall VIN: 1G3AG53MOR
Hi fellow tecs.This car will stall at a decel from 60 km per hour when almost stoped.Driving slower and it will be ok.The coustmer told me today that it dose it with less than 1/2 tank of gas a lot more.In the shop it works great and when driving.Will do it co...
1993 Pontiac Trans Sport 3.8L No Start, Cuts out, Stall VIN: 1GMDV08L9D
This one is a wiring nightmare. My brother inlaw bought this one not running even after i told him not to! Replaced ignition module ran great for 2 months. It started to not shift with cel on intermently.Then the other day it quit. I got it and it started and ... Trouble codes: 17 (crank signal shorted), 18 (crank signal open/no signal), 42 (electronic spark timing problum), 56 (qdm 2problem)
1998 Pontiac Grand Prix GT 3.8L Cuts out, Stall VIN: 1G2WP52K7W
The complaint was car stalling just like before.We had replaced a crank sensor a bout 6k miles ago.Checked codes,none,let engine warm up.Started to drive off when engine shuts off.Coast to side of road and try to restart.cranks no start but notice scanner says...
1999 Saturn SL1 1.9L speedometer, tach VIN: 1G8ZG5280X
Looking for some Saturn advice, I got this 1999 that when you turn the key in the on position the tach needle and sometimes the speedo needle vibrate. When you shut the engine off the tach will continue to vibrate for about 5 seconds. Once you drive for a few ...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Limited 3.8L ignition & injector pulses VIN: 1G4HR52L9S
Thanks for all the help. I had 20 replies to my troubled buick. Of the replies I had 2 fixes pertaining to security circuits, 6 fixes for computer replacement, 9 fixes for crank shaft sensor, 1 camshaft sensor & 2 wiring between computer & module. I replaced t...
1997 Cadillac Seville SLS 4.6L Cooling sys. VIN: 1G6KS52Y9V
Found exhaust gasses present in the cooling system. From what I've found out about this engine, the head bolts pulling out seems to be a common problem. Recommended a replacement engine to the customer. Customer has decided to trade the car.
1987 Chevrolet Astro 4.3L Engine Performance - hesitates / stalls when cold VIN: 1GNDM15Z2H
Thanks for all the replies. Many of the ideas I had tried with no improvement. Customer states that he has spent enough money for now on such an old vehicle. I summarized all the replies I received and gave to customer, he will try at his own pace and expense.
1996 Chevrolet Caprice Classic 4.3L Hesitation, Surge, Stall VIN: 1GBL52W1TR
After reading all the info on testing the EGR valve i found i is a backpresure type and shouldnt open until there is enough pressure in the exhaust..the problem was it opened all the time..even at light acceleration. I tested the egr by applying vacum to the v...
1997 Chevrolet C3500 Cheyenne 6.5L No Start VIN: 1GBKC34FBV
Four of you gave me information that helped me lead my diagnostics to a faulty injector pump. Replaced pump with a rebuilt one, truck now starts and no more driveability concerns. Thanks again and merry christmas Trouble codes: P1216 (Fuel solenoid response time to short).
1997 Chevrolet C2500 Cheyenne 6.5L Cuts out, Stall VIN: 1GCGC24F9V
sorry for the delay in closing - i have not been able to get a hold of customer for futher testing - i got ten reply`s - told how to check for proper prime pump pressure & flow - most said injector pump module on side of pump. when i get this truck back in and...
1999 Chevrolet Tahoe 5.7L top engine noise VIN: 1GNFK13R5X
As most or the responses stated, the intake gaskets were worn out. We check'd past history on this customer and found that we told him about his intake leaking 40,000 miles ago. Well we pulled intake and wa-lah! oil and coolant all over. Cleaned all areas up, ...
2000 Chevrolet K2500 7.4L MIL Lamp on VIN: 1GCGK24J4Y
Thanks to the all the techs for their input. One did hit the problem on the head when he said check the map sensor. The map is the check for the egr flow, As little as 3kpa. off (scan data read) can cause a problem. The book says pull the upper intake plenum t... Trouble codes: P0158 (B2S2 O2 Sensor Voltage High), P0152 (B2S1 O2 Sensor Voltage High), P0132 (B1S1 O2 Sensor Voltage High), P0401 (EGR Flow Insifficient).
2001 Chevrolet Monte Carlo SS 3.8L Stall VIN: 2G1WX15K61
Well guys, thanks for the help on this problem child. What we did to fix this vehicle was to replace the post cat. convertor ho2 sensor and we also found fuel leaking out of the fuel pressure regulator, very,very small amount. Fuel pressure regulator was check...
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