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Open Help Requests for GM
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2000 Buick Century 3.1L Misfire
This vehicle came in to replace leaking (coolant) intake manifold gasket. After changing gasket we had a vacuum leak. After redoing intake gasket students got some intake and exhaust push rods switched and bent some valves on restart. Removed and sent heads ou...		 View
1994 Cadillac Eldorado 4.6L MIL Lamp on
I changed ICM, No change. By-pass go Hi as soon as engine starts. All the 24X,4X,Cam signals, IC control waveforms are clean and sharp. I'm geting frustrated! Trouble codes: 23 (Ingnition controll problem).		 View
1998 Chevrolet Cavalier 2.4L abs module-no communication
vehicle came in with the abs and brake warning lights on. hooked up Solus and checked for DTCs. no communication between module and scanner. checked DLC connection, fuses and relay:good. checked for communication between scanner and PCM:ok. suspected a failed ...		 View
2004 Chevrolet Silverado 6.6L 5th gear
Hoping for some help on this Allison. Vehicle was brought to us from a tractor sales outlet. Needless to say, it does a lot of towing and hauling. We were told that, when towing, it would all of a sudden rev up and red line the engine. After coming to a stop, ...		 View
1989 Oldsmobile Cutlass Ciera 2.8L No Start
Good day fellow tech's, This vehicle was towed in with a no start condition. Vehicle has spark on all six but no injector pulse. I went though the no start flow chart from All-Data and it lead me to the ignition mod. Replaced. No change. The Crank sensor was t...		 View
1996 Oldsmobile Bravada 4.3L Cuts out
After changing when you go to drive the vehicle it blows the ecm fuse anybody have any ideas		 View
1998 Oldsmobile Bravada 4.3L alternator
the charging system puts out under no load 14.6 to 14.14v after runing for 35 min. place a load (a/c, rear defoger, heated seats, headlights) on it and you can watch the voltage drop in 3 min from 14.6 to 12.6v. the "l" wire seems to go to the vcm. installed n...		 View
1994 Pontiac Grand Prix 3.4L power antenna
Greetings. Looking for schematic for this power antenna setup. It is the non relay oonfig (coupe). Alldata and Chiltons only provide for the relay config (sedan). The connector at the antenna motor has org, drk grn, and blk wires. Org is always hot driving the...		 View
1997 Pontiac Grand Am 2.4L Cuts out, MIL Lamp on
This car starts fine but sets a code P0335 every time. I have replaced the crank and cam sensors, ignition module and PCM. Checked the wiring and terminals from the crank sensor to the ignition module,and from the ignition module to the PCM...all ok, no proble... Trouble codes: P0335 (Crank Shaft Position Sensor Circuit).		 View
2000 Pontiac Grand Am 2.4L Cam Supports
Hello, This vehicle came to us with oil leaks. Engine was very oily but we saw clearly the base of the cam supports were leaking. With the high milage on the vehicle we sold a complete valve job. The car is back with the same oil leak. Somthing I find interest...		 View
2002 Pontiac Aztek 3.4L No Start
Towed in with no start. Has spark 55 psi fuel press. No inj. pulse. Has code u1040 in BCM I beleive this is a theft related issue but our diag. equip. (and knowledge) is limited on this subject. Point me in the right direction if possible. Also had no cam sign... Trouble codes: u1040 (loss comm.).		 View
2002 Pontiac Bonneville 3.8L Stall
Hello I have this 2000 Bonneville that stalls intermittently when coming to a stop like the key was turned of. It might stall 3 times one day and the next it will run fine. When it stalls it starts right back up and idles fine. It will do it cold or hot. Ther...		 View
1993 Saturn SL2 1.9L No Start
car come in no start, has fire to spark to spark plugs, fuel pressure ok, unplug one fuel injector very weak noid light, injector plug-in has power on both sides, unplug another injector (random)same result, unolug a third or forth and you have flashing noid l...		 View
2001 Saturn L300 3.0L MIL Lamp on, No power
Hello everyone. We are a Ford dealership trying to daignose this fine Saturn. Problem with the electronic throttle body controls. First concern is that I have no communication with my Snap-on Modis, with either PCM or ABS modules. Talks to BCM ok. Used Generic... Trouble codes: p1516 (ETB error).		 View

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick LeSabre 3.8L Electronic
Plain and simple as you might guess from the symptoms, we replaced the door switch and all is fine. When we talked to the customer about the price she mentioned that sometimes the display on the door would go out. Never mentioned this before. Thanks all...MIcK		 5
1997 Chevrolet Cavalier 2.2L Mechanical
thanks to all that replied we pulled the timing chain cover everything looked good so we decided to pull the head again to take a second look #3 cyl looked like it had score marks on the walls i was thinking bad piston or pin pulled piston it was worn but when...		 14
1998 Chevrolet Malibu 2.4L rod bearings
it is possible but not recommended to replace just rod bearings w/ engine in car..vehicle not repaired ..customer was to trade car in...thanks for taking the time		 3
2003 Chevrolet Avalanche 5.3L engine
well, it seems the cause of this one is metal from #1 exhaust lifter roller and cam lobe plugging the lifters. It looks like this may have been going on for some time, as the oil pump is scored and it also looks as if the rod bearings have been hot, and rockin...		 10
2001 GMC Savana 5.7L Misfire
the reason i havent closed this one out is i am waiting for the heads to come [...] from the machine shop, this thing had a intake valve sticking on number one cylinder,i was going to finish the job before i closed it out thanks for the replys i recieved.		 17
2001 GMC Sierra 5.3L 2-3 shift
Sorry this took so long, I kinda just pushed it aside for now. So as far as i know afer the little time i spent on it is that it almost has to be a valve body issue, Will post the fix to this hopefully when i get a chance to swap valve bodies. Thanks you all f...		 7
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