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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for May 14, 2005
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Open Help Requests for GM
Help Request Answers
1993 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP53L5P
Hello again, and thanks to all reading this. 1993 Buick LeSabre, 3800 mpfi, maf system, well maintained, runs well. customer complaint of acts like it will stall at times, loses power, speedo drops a little, and then resumes power. Thorough ignition testing re...
1999 Cadillac DeVille 4.6L engine VIN: 1G6KD54YOX
Vehicle was brought to me for overheating problem. Has been ran very hot. Customer was told had blown headgasket. Has Northstar engine, I drove vehicle, ran great was not able to make vehicle run hot. pressure tested cooling system, found radiator cap bad. rep...
2004 Cadillac Escalade 6.0L compressor VIN: 1GYEK63NX4
Ok GM Techs, we need a little help. (its 5:00 on Friday and we are trying to get some info for Monday morning) I know this electronic system has been used for several years on a lot of the GM SUV's but we have not seen any problems here yet. The customer got t...
1995 Chevrolet S10 LS 4.3L Excessive Emissions VIN: 1GCCT19Z9S
This car failed the asm emission test for 15 mph and 25 mph for excessive nox. First we found the Egr vac control solenoid to be less then 2 ohm. So we replaced it. Under the diagnosis it said that there could be damage to the ECU. After replacing the sol.,We ...
1997 Chevrolet S10 4.3L Hesitation VIN: 1GCCS14X4V
Fellow iATNers, This is poor old dad's vehicle who is, of course, from out of town and needs some assistance with his troublesome Vortec. The archives yield many issues with 4.3 and 5.7 varieties alike. This engine never once stalls, it hesistates with moder...
1998 Chevrolet C1500 Cheyenne 5.7L Mechanical VIN: 2GCEC19MXW
hi everyone.this truck came in with an a/c problem.i replaced the compressor and a/c drier.i evack and charged the system.the pressure on the high side is 150.the presure on the low side is 70.that is only with one cane of fr. a134.checked for restriction and ...
1992 GMC Safari SLE 4.3L unknown VIN: 1GKEL19W5N
Van cranks takes about 10-15 bumps on the ign to catch and start(not starter).Tested and have good spark and fuel, but I hooked the computer up to it was not recieving tach/rpm however still had spark. im not sure what else we can test or replace. We looked fo...
2000 GMC C6500 7.4L No Start VIN: 1GDG6H1B5Y
When you try to start this truck it pops back thought the the intake or the exhaust and sounds like you advanced the timming the starter will stop turning sometimes before it starts.It's like the computer thinks the eng is already The starter will not ingage w...
2003 GMC Yukon XL 1500 SLT 5.3L master cyclinder VIN: 1GKEC16T33
this vehicle is used by police depatment and was driven very hard during a persuit. Brakes were very hot upon inspection.
1990 Oldsmobile Delta 88 Royale 3.8L Poor Idle Quality, Surge, Stall VIN: 1G3HN51CXL
Car came in yesterday chugging and stalling. Fuel pressure is good, sensors are good. TCC was unplugged when it arrived; plugged back in. Shift codes are still there. Quad drivers control fuel delivery and shifts. Problems with the ECM? Appears to be fine, loo... Trouble codes: 31?, 27 (2nd gear shift problem), 28 (3nd gear shift problem), 29 (4nd gear shift problem)
1994 Pontiac Firebird Formula 5.7L No Start VIN: 2G2FV22P2R
no start condition: good spark, good fuel pressure but has random injector fire. ignition scope pattern shows good spark line fire to all 8 cyls. injectors have constent power but looses ground signal at times but randomly. one injector will fire and then not ...
1997 Pontiac Grand Am SE 2.4L Hesitation, Surge, MIL Lamp on VIN: 1G2NE12T7V
Car Came in with check engine light on with codes p0335a ckp circuit,and code p0341b camshaft position sensor circuit,road tesed vehicle on normal acceleration about 30-40mph vehicle starts to surge or buck ease of gas surge or buck goes away only happens betw... Trouble codes: P0335, P0341

Fixes & Summaries for GM
Fix/Summary Answers
1990 Chevrolet C3500 Cheyenne 5.7L alt VIN: 1GTHC34K2L
Hello:Thanks for all the replies,there was 20 in total.Due to the fact that this is a landscaping contractors truck,we have not been allowed the glory of fixing it due to his schedule and work load.But we have learned that is we connect the dump to the aux bat...
1995 Chevrolet Tahoe LS 5.7L 4-3 downshift VIN: 1GNEK13KXS
Customer finally brought vehicle back for me to test a little further.First thing I did was line pressure test & watch solenoid commands to see if pressure was bleeding off as solenoids were being commanded on as suggested by Sean and noted nothing unusual.He ...
1998 Chevrolet Camaro 3.8L No Start, Stall VIN: 2G1FP22K8W
The vehicle is fixed it was an intermittent problem with the ignition module. The scan tool showed no rpm and then the next time it would show rpm. the fuel injectors would pulse and then they would not. Many other problems would come and go all involved fuel ...
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