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Prev Professional Automotive Repair Technical Discussions for March 20, 2012
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Open Help Requests for GM
Help Request Answers
2004 Cadillac Escalade 6.0L MIL Lamp on
Hello and let me thank you all in advance for reading my post. I first received this 04 cadillac escalade with a code -p0446. I checked all corresponding circuits to the vent valve and purge valve and fuel tank pressure sensor and all circuits checked out ok. ... Trouble codes: P0446
1994 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Surge, Stall, Misfire VIN: 1GNDT13W2R
Car came in to the shop with a surge complaint,misfire.This is her daily driver surge,misfire happen she brought in same day.After verifying that i saw spark leaking from the aftermarket accel coil to the intake.Thought easy fix installed new ac delco coil,vec...
1996 Chevrolet S10 LS 2.2L Surge, MIL Lamp on VIN: 1GCCS1946T
Hi there guy's, I could sure use some of your advice and experience on determining what is wrong with this vehicle. The following vehicle has trouble code P0171=Fuel Trim System Lean. Freeze Frame Data is as followes: AF Ratio=14.6:1 Calc. Air Flow=36.73 g/s E... Trouble codes: P0171
1997 Chevrolet Venture LS 3.4L Surge, Misfire, MIL Lamp on VIN: 1GNDU03E4V
Hello everyone, got this gm that is giving us p0300 codes intermintently. As one can see I have replaced parts that were worn out and tried new parts and/or known good parts for testing purposes. What stands out is the neg fuel trims all the time and an approx... Trouble codes: P0300
2000 Chevrolet K2500 7.4L Steering VIN: 1GCGK24J8Y
Vehicle pulls left especially when driving on road crown. Are these alignment specs acceptable? Front left toe = +1/32. Front right toe = + 1/32. Total toe = + 1/16. Front left camber = +3/8. Front right camber = +1/4. Side to side camber = +1/8. Left caster =...
2001 Chevrolet Express 2500 4.3L Misfire, MIL Lamp on VIN: 1GCFG25W01
Van seems to run fine but sets missfire moinitors for #1&4 cyls. No missfire at idle but starts at about 1500 to about 2600 rpm. Does'nt show missfire under hard accel or idle just steady cruise. We reset cam retard from -10 to 0 which got rid of p1345 but mis... Trouble codes: P0300, P1345
2004 Chevrolet Colorado LS 3.5L Misfire, MIL Lamp on VIN: 1GCDT13624
Criuse speed no miss detected in any cylinder ?? Only hot idle I think its the same cylinder head issue that GM has a bulletin out for improper valve to cylinder head seating is the cause i think any GM tech no if i could be right . I was a GM tech for 24 year... Trouble codes: P0302 (2 cylinder missfire detected read missfire data 2 missed for 3000 times all others ok), P0300 (Random miss ater clearing)
2009 Chevrolet Silverado 1500 LT 5.3L can't reset TPMS VIN: 2GCEK290X9
- tech didn't keep them in order of removal. Installed summer tires and tried to relearn tire position (used modis to put into tpms relearn) We are getting the truck to start relearn 2 beeps, start the relearn with a snap on tire relearn tool left front it bee...
2003 GMC Sierra 1500 HD SLE 6.0L heating VIN: 1GTGK13U83
vehicle came in with a complain of not enough heat. heater will work fine when first started and as long as it is no driven heat will come out of the vent. when you drive a couple of blocks down the street, it will start to loose heat and then it just blows lu...
2007 Hummer H3 3.7L oil pressure VIN: 5GTDN13E37
veh came in for oil light coming on at idle when engine is hot. we installed a gauge and found oil pressure when idling and warmed up was at 2 psi. mitchell shows the min oil pressure spec to be 12 psi at 1200 rpm. oil presure is 16 psi at 1200 rpm. above min ...
1986 Oldsmobile Delta 88 Royale 3.8L Instrument lights
Problem solved! I went down to Las Vegas and visited my brother. I got a chance to take a look at his 1986 Olds Delta 88 inoperative Instrument light problem. I found that there wasn't enough voltage getting up to the printed circuit board, we cleaned all the ...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac Eldorado ETC 4.6L Blower VIN: 1G6ET1297V
The blower motor was the problem as pretty much everyone said. The key to good diagnostic skills is understanding the system, and once I learned out how the blower operated, testing was a snap. Then replaced the heater core, and that took care of the heat iss...
2002 Chevrolet Silverado 1500 5.3L Steering VIN: 2GCEK19TX2
Thanks for all the responses-- a steering gear box and flush did the trick.Gerry, thanks for the insight on jorgen auto Matt
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