Hello,
I've been lurking for over a year now looking up various solutions to all the problems I've found in my 1999 "trail"Blazer. While I've managed to replace the heater core, drivers side door (pins were too oval and ate 3 sets of replacement bushings), weld up the completely sheared door striker, replace the door panel with one with an intact door handle AND replace the window regulator and motor with help from this forum, I haven't found a solution to the following problem. Not long after changing the heater core, I installed an aftermarket CD player, and it does not shut off when I open the Driverside door. It shuts off when I open the other 3 though. Even after replacing the entire door, it won't shut off until it times out. Same with the interior lights until the MOST pressing problem started. Maybe 3 months after the Heater core, all hell broke loose around the same time. I lost 1st and 4th gear, shortly after that, automatic headlight (always on) and driving lights (won't turn on) controls stopped working along with the rear hatch release button on the dash along with a slow drain on the battery. It's dead if I don't drive it for 4-5 days. As far as the automatic 4WD/2HI/4HI/4LO, well they were iffy when I bought it. It had well over 200K on everything when I bought it and needed a lot of little things like full tune up, short interval oil changes (I thought the HG's were blown but it was just that bad from previous owner), new tires, the door and striker, radio, and super scrub down inside and out BEFORE the heater core. My question is: I have the solenoids now but should I be looking for a pinched wire or bad ground to the PCM before dropping the pan? I'm 90% sure the truck wasn't on a good service interval and it's going to be sketchy even if I save the tranny fluid and add a qt of lucas trans fix. Is there a chance I lost 1st and 4th due to a bad wiring connection dating back to my Heater Core change? The body is straight and rust free and aside from the dashboard cracks and carpet, I've cleaned the interior up to a pretty nice point. Certainly nice enough to haul the dog back and forth at least at sub freeway speeds.