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Prev Professional Automotive Repair Technical Discussions for May 13, 2009
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Open Help Requests for GM
Help Request Answers
1989 Cadillac Brougham 5.0L Charging VIN: 1G60W51Y5K
This one has got me questioning my abilities as a mechanic. Vehicle came in with complaint of the battery dying. I did a battery test, came up dead and wouldn't hold a charge. Jumped off and tested alternator. Found alternator not charging. Naturally, Replaced...
2005 Cadillac CTS 3.6L Left Side Sec Timing Chain
Howdy there everyone. Wha tI have here is a very weird 2005 Cad CTS with the 3.6 engine. Came in to the shop with a severe misfire, spittin and sputtering, and hardly any power. Hooked up trusty ol' scanner and found cam sensor codes for the left bank of cylin...
1994 Chevrolet Camaro 5.7L MIL Lamp on VIN: 2G1FP22R4R
good day, we have a 94 camaro with 5.7 v8 setting code 29 for a.i.r. pump and blowing fuse. there is not much info on this system and the wiring diagrams are sketchy at best. it appears the diverter valve is internal... theory in mitchell says the pcm may cont... Trouble codes: 29 (air)
1995 Chevrolet Corvette 5.7L Hesitation VIN: 1G1YY22POS
Hope someone has ran into this problem before. I have replaced dist. with an Accel opti spark unit. Now vehicle spark knocks under acceleration, It may sound obvious but I do not want to replace this dist. If these are proven to be good dist.Has any one had an...
1997 Chevrolet Cavalier 2.2L stub shaft VIN: 1G1JC1247V
I am replacing the left axle seal in this car and it has a stub shaft that comes out about an inch. I have yet to find a tool that is capable of grabbing the splined shaft to remove it. Has anyone ran into this before? Any help will be greatly appreciated!!!
2000 Chevrolet C2500 5.7L Poor Idle Quality, Cuts out VIN: 1GBGC24R5Y
After replacing the cylinder heads on this truck it will not run properly. misfire data shows miss on cylinders #1 and #2. There is a misfire (at idle) of less than 50 on #1 and around 180 on #2 cylinder. When rpm is increased to about 2000 rpm #1 cylinder goe...
2004 Chevrolet Astro 4.3L abs VIN: 1GNEL19X24
This Astro Van is from a used car dealer at slow speed ABS false activation develope,I replased front and rear rotors and pads AC Delco parts,but I still have the problem there is no ABS light or codes,there is signal coming from front right and left HUB.Thank...
1995 GMC Jimmy 4.3L Poor Idle Quality, Surge, Poor Fuel Economy VIN: 1GKCS13W55
1995 GMC Jimmy, 4.3 L Vin "W" Spider type fuel injection. Customer complaint: Running rough and cutting out cold or hot. My problem is that after performing all of the below, I still have a RICH condition and no O2 activity at idle. I have removed every sys...
2003 GMC Sierra 1500 SLE 4.8L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: 1GTGC13U73
Customer complains of int. reduced engine power and mil on. Check for history and found 3 codes. Tried to verify the problem was unable to duplicate problem at this time. Seen tsb for loose ground. I checked the ground 103 and 104 it was at german specs good... Trouble codes: P0220, P1518, P2135
2003 Pontiac Grand Prix SE 3.1L No Start, Stall, MIL Lamp on VIN: 1G2WK52J73
The customer drove it in and I drove it into the shop. It had these six codes, but was running great. After a day of starting, and monitoring PID's it started acting up on a more regular interval. I have good solid 5 volt Referance when I check at each compone... Trouble codes: P0122 (TP Circuit Low), P0452 (Evap Pressure Signal Low), P0462 (Fuel Level Sen. Low Volt or Short), P1122 (TP Cir. Int. Low), P1635 (5 Volt Ref. Cir A Low), P1639 (5 Volt Ref Low TCM A/O Fault)
2001 Saturn SL2 1.9L starting VIN: 1G8ZJ52771
Here is a 01" saturn sc2 that came in here with a start and die problem. security light blinks for four or five seconds and then stays on solid. I have tested the serial data line for shorts or high resistance and it all checks out fine. there is a u1000 commu...
2005 Saturn Ion-2 2.2L Misfire, MIL Lamp on VIN: 1G8AJ52F25
vehicle has no spark on 2 and 3. replaced coil and module with no results. using longer spark plug wires to connect scope, we find no spark on #2 & #3. probing driver from ecu we see the same pattern for #1 & #4 white wire to be the same as #2& #3 orange wire ... Trouble codes: P0300

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Park Avenue 3.8L Misfire VIN: 1G4CW52K4X
hi guys, thanks for all the replies. sorry it took me so long to post the fix. an ignition module fixed the misfire. i still cant figure why i have no misfire counters but, the car is running well and the customer is happy. thanks again, bill b
1993 Cadillac DeVille 4.9L Excessive Emissions VIN: 1G6CT53B7P
It's done, TG... If you want to skip the story and read the fix, scroll to the bottom, but then you miss the good stuff! I knew I was overlooking something and it is no surprise that it was something simple, If only I had looked there first. Like the analogy ... Trouble codes: 52 (Memory Reset).
1966 Chevrolet chevy 11 383CID paint VIN: 115376N130
Thanks to everyone who took the time to read my request. Robert sent me a web address [paintcodes.net/chevy-paint-codes-1966.html] that has all the GM and ppg codes for all years, Paint is on the way. Thanks again to all
2000 Chevrolet Cavalier LS 2.2L A/C compressor VIN: 1G1JF5249Y
Many thanks to all those who replied. I'm feeling pretty stupid right now for overlooking this. It was indeed the cooling fan. I guess when you have your head down for so long it's easy to overlook the basics. Thanks again to everyone for the quick and accurat...
2000 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEK14W8Y
Thanks to all who responded.This sucker is fixed! Well, the voltage was a weak battery with a bad connection. I charged it and cleaned the terminals, voltage now good but still no spark. It needed a ICM, replaced it and all is well.
1998 GMC K3500 Sierra SL 6.5L front axle VIN: 1GTHK33F7W
Thanks for the help every one! This is a manual shift transfer with the new design actuator from the factory in a late 1998 truck. I found the actuator wires burnt behind the starter, I repaired the wires-still not working all the time. the front axle would lo...
1998 GMC C3500 Sierra SL 6.5L noise VIN: 1GDKC34F5W
The clutch turned out to be a heavy duty aftermarket version that has only a single set of heavy springs in the clutch disc. I suspect that this disc was rattling substantially as the remainder of the parts everyone suggested all turned out to be no trouble fo...
1992 Pontiac Grand Prix SE 3.1L Ignition VIN: 1G2WJ14T8N
Hey everybody,it took three days to figure this one out,turns out the wire harness from module to crank sensor the female connector to the crank sensor was swedged out slightly and giving an intermittant connection to the module from the crank sensor,a little ...
2004 Pontiac Grand Am SE 2.2L flasher VIN: 1G2NE52F64
Thank you to all who replied. I got a multi function switch and put in it. That fixed it. Thanks again, Jerry
2004 Pontiac Grand Prix GTP 3.8L lifters VIN: 2G2WR524X4
Thank you from all the replies. Tride engine clear with no chang. Removed lower intake. Didn't find any sludge. Did find all lifter stuck at 1/2 to 3/4 stroke. Replaced all lifters. Have been driving the car for about 2 weeks now. I will call this one fixed. I...
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