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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for December 29, 2009
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Open Help Requests for GM
Help Request Answers
1978 Cadillac Eldorado Biarritz 7.0L wheel bearing VIN: 6L47S8Q275
Greetings, I've got this old Eldog with loose front wheel bearings. I've got the bearings and seals replaced, but they are "different" from what I've seen, or remember about these old cars: It's a pair of tapered roller bearings that fit in the hub, then the C...
2005 Cadillac CTS 3.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6DP56765
No experience on this engine.Car was towed in 2 weeks ago and would not start, found almost no oil in engine, changed oil and vehicle started and has been running fine since. Now we have a rough idle, with misfire codes on bank 2 and intake correlation code P0... Trouble codes: P0018 (Crankshaft- Intake Camshaft Correlation Bank 2), P0012 (Intake Camshaft Position Performance Bank 2), P0300 (p0301-), P0301 (p0302-), P0302 (p0304-), P0304
1983 Chevrolet Camaro Z28 5.0L Excessive Emissions VIN: 1G1AP87H1D
I need some help on this car. We have ran it through emmisions mutiple times and our CO reading is always high. We replaced the cat and detuned the carb. Is there anything else that will effect the CO that I can do or adjust? CO is at 33.02 GPM and the standar...
1992 Chevrolet S10 2.8L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GCCS14R2P
would not idle or rev up when it came in. could barely get it to run. now with new distributor starts and idles decent. but if you touch the acccel it bogs and engine wants to die unless you work the pedal. any accel or load and it just bogs, you can kind of r...
1995 Chevrolet G30 Sportvan 5.7L Drum brakes VIN: 1GAFG35K8S
This van came in for a rear lockup and then an appropriate ABS engagement. The LR brakes were locking up due to axle grease on the shoes and the seals, brake linings and springs were replaced on both sides as well as resurfacing the drums. At that point the pr...
1995 Chevrolet Astro 4.3L heater
Customer had this at the local major repair chain for repairs. They have since closed and we now have it. It cam in about 5 with the complaint of no heat unless you are at cruising highway speeds. If you take your foot off the gas, within 10-15 seconds the air...
2001 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Misfire, SPARK KNOCK/PINGING VIN: 2GCEC19W81
Hey everyone, i have a tough one on my hands. Customer brought this thing in this morning stating that it started misfiring yesterday and that the check engine lamp came on. No major details just that. I started the vehicle and it was knocking violently like a... Trouble codes: P0300
2003 Chevrolet Silverado 1500 4.3L Starting VIN: 1GCEC14X93
This is a bare bones truck: This vehicle will not start - has P1626 for no signal from BCM when attempting to start - Have checked all fuses, power and grounds to bcm (ok) - BCM cannot communicate with Tech 2 - I have U1000 codes for all the other modules on t...
2003 Chevrolet Trailblazer LT 4.2L Rotors, Brake pads VIN: 1GNDTBS132
Puzzled by this one. Customer came in for a brake job, after looking at the brakes the front and rear on the left side of the vehicle are worn to the metal however the right side are at 50%. Any thoughts?? Is there a known issue with the situation? Thanks!
2006 Chevrolet Equinox LS 3.4L charging system VIN: 2CNDL13F56
Hello! Any help you can give us with this nightmare will be greatly appreciated. Customer complained that her 2006 Chev. Equinox LS would have a dead battery after letting it sit overnight. We had the vehicle towed in and charged the battery fully and tested b...
2006 Hummer H3 3.5L Phone VIN: 5GTDN13696
Using my TECH2; I have already tried all possible options to de-activate the phone without any luck. Please provide the Manufacturer step by step procedure on How to deactivate or at least quiet the disturbing voice message. Appreciate prompt answers
1992 Pontiac Trans Sport 3.8L No Start VIN: 1GBDU06L7N
Came in by wrecker, a no start. Actually starts & dies was cust. complaint, but when it got here it started & ran good for a few minutes, then went to starting & die, start & die. When it starts it is getting pulse & spark but just for a second or 2. We replac...
2001 Pontiac Grand Am GT 3.4L rad
i have 3.4l 01 grand am with engine oil in resevior , about 1/4 l. no coolant in oil. has small external coolant leak @ back of intake.is it possible to be intake problem or is it head problem for sure.
2002 Saturn Vue 3.0L Misfire, MIL Lamp on VIN: 5GZCZ63B42
Found timing belt one tooth off on bk 1 and wrong spark plugs installed. Reset timing belt and installed correct sp plugs misfire still present under load cyl #2-4-6. Ive checked for vacum leaks w/smoke machine and fuel. Ran compresion ckecks cold and hot chec... Trouble codes: P0300, P0302, P0304, P0306, P0481

Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Eldorado Touring 4.6L dashboard VIN: 1G6EL1299P
after getting replies from richard [...] i went ahead and had the ipc tested and repaired at the local gm dealer.while they were testing it the ipc acted just like in the car.a new ic circuit board was replaced and then it passed their t...
1996 Chevrolet C1500 5.7L No Start VIN: 1GCEC14R6T
Thanks again for all the help. It is finally fixed!! It was the aftermarket crank sensor after all. Its wierd though that the aftermarket sensor worked in the old motor but not the new one, and id think id get some kind of signal out of it. Anyway, special tha...
2001 Chevrolet Cavalier Z24 2.4L Misfire VIN: 1G1JF12T31
Everyone thought is was the coil housing and everybody was right. I used an old set of plug wires to curcumvent the coil housing and voila all four firing. What led me astray was the customer told me he replaced that part a month ago at another shop. Now he ha... Trouble codes: P0300 (Random Misfire).
2003 Chevrolet Silverado 1500 LT 5.3L headlights VIN: 1GCEK19T53
thanks for all the help.as stated in my original post i had tried a new headlight switch and multi function switch and relays.this problem was not permanent and showed no regular patterns of failure.my final repair was a bcm,no problem since any more ideas wil...
2003 Chevrolet Silverado 1500 5.3L abs module VIN: 1GTEK14T83
motor had 20 ohm short between primary & housing. replaced motor & another module. all is fine so far.
2004 Chevrolet Trailblazer LS 4.2L no crank VIN: 1GNDT13S84
I can not tell you all how much I appreciate all of your input, all of you are great. Their were never any codes and all data was normal, I was just not getting a signal out of the PCM to the starter relay. It took a replacment PCM (180.00) , in-shop prog...
2007 Chevrolet Equinox LT 3.4L transfer case VIN: 2CNDL23F57
Talked with customer this morning. Had TCM reflashed and doesn't seem to be having any more trouble. Thanks to both Dave's for leading me to the TSB and wayne for e-mailing me the flow chart.
2007 Chevrolet HHR LT 2.2L Misfire VIN: 3GNDA23D77
I received so many replys implicating the injectors I replaced all 4. They were inexpensive and it only pays 1.1 hours to replace them. The light has been out for a week now so it's a fix,don't understand why the injectors on this vehicle are so bad about stop... Trouble codes: P0301 (Misfire cyl. no 1).
1995 GMC Sonoma SLE 4.3L No Start VIN: 1GTDT19W9R
Well it was a long round about process but it is finally fixed. Ultimately I'm not sure if the fix was a new distributor/ign. module or a fuel pressure regulator. I began the day with the truck turning over and not firing, not even with starting fluid. I to...
1997 GMC K1500 Sierra SLE 5.7L Cuts out, Misfire VIN: 2GTEK19R8V
the bank one o2 sensor would int. go full rich leaning out bank one never had a o2 sensor have that great of effect on fuel to the point of miss firing all cly on one bank just goes to show no matter how long you have been in this buisness you learn everyday d...
2002 GMC Sonoma SL 4.3L Misfire VIN: 1GTDT19W72
thank you everyone for all the helpful input. i noticed on the top of the injector harness there was a small trace of raw gas present. i decided as long as i replaced one already it wouldn't hurt to warranty it for the customer. when i took it apart i saw a sm... Trouble codes: 306 (cylinder 6 misfire).
2002 GMC Sierra 2500 HD 6.6L No Start VIN: 1GTHK29172
Thanks to all who replied to this problem. There wear some good suggestions that eliminated a lot of areas of concern. Paul mentioned the wire harness near the fuel presure test port and it was almost rubbed through but not far enough to short out to ground.Th...
2000 Oldsmobile Intrigue GL 3.5L engine VIN: 1G3WH52H3Y
Thanks for the overwhelming amount of replies and help! The fix was to install GM's updated thermostat that Rick mentioned in the first and second replies. To provide some detail, the thermostat comes attached to the water housing, and you can't put it in ba...
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