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94 Blazer Coolant Temperature Fluctuating

Hello I have a 94 Blazer that has an unusual problem of the gauge jumping up to 260 degrees and then after a couple of seconds dropping back down to 210. This will happen at cruising speed, in town, and even at idle. I replaced the thermostat as well as the coolant sending unit in the head. The...
- Samuel Churchill
- Thread
- Apr 26, 2020
- coolant sensor overheating temp gauge temperature gauge
- Replies: 17
- Forum: Engine Performance + Maintenance
Power Door Locks will not Unlock but will Lock

Hello, I have a 1991 C1500 and ever since I bought the truck the doors would lock but not unlock. This has been baffling to me because the lock/unlock just switches polarity. At first I thought it was the switch itself but both doors will function perfectly locking but does note even make a...
- Samuel Churchill
- Thread
- Apr 10, 2020
- door lock lock lock wiring power door lock
- Replies: 1
- Forum: Audio + Electronics
4l60e Torque converter lockup question

Hi I'm new to this forum but I have a newbie question for you guys. My question is concerning the torque converter lockup on the 4l60e transmission. I'm not a fan of the automatic transmission in general because of the way it drives. I've extensively driven a 94 blazer, 08 duramax, and my 93...
- Samuel Churchill
- Thread
- Feb 13, 2016
- Replies: 1
- Forum: Transmissions