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M
700r4 lost third gear and overdrive

Hey everybody, I got a 1988 K1500 with a 5.7 and a 700R4. After a year and a half of getting this beast back to roadworthy, I finally did it. The wiring harness caught on fire and I resoldered it. Timed it perfectly according to my buddy with the shop and timing light. Got it on the road and the...
- Mike Severance
- Thread
- Jul 26, 2021
- Replies: 6
- Forum: Transmissions
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1988 GMC K1500 Fuel Pump Relay Wiring -- Need Urgent Help

So, I got this 1988 GMC Sierra SLX a year and a half ago, the original engine's oil pump got clogged up with some kind of silver flakes, radiator exploded, dropped a new engine in it, in the process of getting it dialed in and timed, a buddy advanced the timing way too far after I switched the...
- Mike Severance
- Thread
- Jul 11, 2021
- 1988 fuel fuel pump relay jumper k1500 wire wiring
- Replies: 3
- Forum: Engine Performance + Maintenance
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Repairing the wiring harness in an 88 GMC K1500, need some help.

Hey everybody, so I have an intricate job to do. I've been trying to fix my truck's starting-idling-dying issue after I dropped a new engine in it. A buddy of mine suggested replacing the fuel pressure regulator. So I let him do it. Little did I know there was gas on the intake. Then he...
- Mike Severance
- Thread
- Apr 13, 2021
- 1988 diagram k1500 soldering wire fire wiring wiring diagram
- Replies: 0
- Forum: Wiring Diagrams
M
88 K1500 350 Swap

Hey everybody, I have this 88 K1500 the radiator exploded in last year. Long story short, I swapped a 350 from an 89 with 87k miles on the odometer into it. It's been having this weird problem where it turns over, idles for a minute, then it dies. Put a new ecm, fuel pump, filter, fuel pressure...
- Mike Severance
- Thread
- Apr 3, 2021
- Replies: 2
- Forum: Engine Performance + Maintenance