Timing Specs on a 1989 GMC S15 4.3 - 1988 GMC S-15

SOURCE: Where can i get the specs for ignition timing on a

I have always set to zero, but heres how, on the passengers side top of firewall ,there is the electrical junction cover ,under the hood. look for the tan and black wire in the big harness some times around the back of the engine, look for the connector in the tan and black wire and disconnect it..start the engine check timing and set to zero, with the timing light. when this is done reconnect the tan and black wire connector and yer done , this wire eliminates the advance and computer adjustments so timing can be set .. yes the engine light will be on and it will show code 42 est bypass fail but this is normal.. light will go out when the connector is reconnected hope this answers your question..good luck,

SOURCE: timing specs

Connector is under right side dash under heater box. It may be tucked under carpet. Wire is tan w/ black stripe. Base timing is 0 TDC with engine warm and connector unplugged.

SOURCE: need specks for timing a 1989 gmc 2500 v 6

need engine size 5.0/5.7.6.4 with or without deistributor without dist it is automatic with could be anywhere between 3-12*BTDC (before Top dead center)

SOURCE: where is the fuel filter

I have 2 1989 GMC S-15 trucks (actually one of them i bought for my daughter). Anyway, the 2.5 four cylinder one has the fuel filter on the firewall between the brake master cylinder and the engine. The other one is a 4.3 six cylinder and the fuel filter is on the inside of the frame rail on the driver's side, kind of under the cab near the fuel tank. Hope this helps.

SOURCE: 1989 GMC S15 4X4 won't

Check the linkage . and also if you recently bough it and have neer tryed it check front driveshaft.

Testimonial: "Thanks,I'll try that"