Transmission fluid has to be added every 2 weeks and blue smoke comes out exhaust when starting up,or when taking off from a red light and has a valve knock when the smoke appears but the knock stops when the smoke stops.the blue smoke only appears when starting up or when starting to move from a stop light then goes away with in a few seconds.
Pull the vacuum line of the transmission modulator valve. If there's oil in the line, the diaphragm in the modulator valve is cracked and engine vacuum is pulling trans fluid into the engine intakee
SOURCE: 2000 GMC Jimmy Transmission Whine
I recently took my vehicle to a transmission shop and they had to rebuilt the transmission right through. I was recently told that the transmission is a common problem in these vehicles. Sad that GM can not fix or recall the transmisison since there is a problem.
SOURCE: 1993 GMC SAFARI WHITE CLOUD OF SMOKE COMING FROM THE TAIL PIPE
usually when your exhaust shoots out white or grayish white smoke your head gasket is out. its not a hard or very expensive fix.
SOURCE: 1998 gmc sierra k2500 wont stay running
you'll need a professional computer to reset how ever there are two relays for fuel on chevrolet
i would suggest finding the second one first
SOURCE: 95 GMC K2500 4x4, 4L80E transmission problem
VSS is still good if you have your cruise control and speedometer working, it's common for the wire harness to the solenoid on the passenger side to get corroded and or the sires to break due to the heat given off from the catalytic converter beside the transmission. Check the condition of the wire harness and clean the contacts with brake cleaner and reinstall with some grease to keep the corrosion away, hint use marine grease. Marine grease cost a few cents more but resist water longer and better then normal lutetium grease, I use it on everything and get longer life out of my u-joints and front end suspension. Most transmission shop will test drive free of charge and scan the truck for DTC codes that sometimes will not show up in the check engine light, but mostly you do have an electrical problem so check all your fuses and wire harness from the ECM to the transmission. Good luck and keep me posted, be glad to help you get your truck running 100% again soon without some transmission shop getting you to replace the whole transmission for $2,300. If you are going to have the transmission service, "fluid and filter changed" Have them replace your boost valve. The boost valve is around $45.00, the boost valve controls the amount of transmission fluid pressure and low transmission fluid pressure will cause the transmission to fail. I replace mine every second transmission service and i have over 365,000 miles on mine. Keep up the good work friend.
Testimonial: "Excellent information from the beginning.Thank you.I worked each of the connections I could locate and disc. the bat to clear the code. Good so far. "
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