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79 k20 5.5 mpg

December 09, 2022, 11:46:57 AM by Wadell | Views: 30 | Comments: 2

Hopefully someone can help me I have a 1979k20 truck stock 350 4 speed im getting 5.5 miles per gallon . Is this normal for this truck or is something wrong

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87 V10 Throttle Body Question

December 09, 2022, 03:13:17 AM by josephshs2008 | Views: 41 | Comments: 2

I didn't really know where else to post this. I have an 87 V10 with the manual 4 speed. I have a couple of the later years throttle bodys as spares/parts. The throttle body on my truck has never been rebuilt to my knowledge. I'm thinking of rebuilding one of my spares. My only question is will the newer style work properly. The only difference I can find is that Throttle Position Sensor is a different style. If I change the Pig tail over too does anyone know if the ECM will read it correctly? Any help appreciated.

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1979 k20 front drive shaft

December 07, 2022, 03:04:14 PM by Wadell | Views: 79 | Comments: 3

Does anyone know if the front drive shaft off a 1986 half ton suburban will fit on my 1979 k20 truck

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Need help 1987 V10

December 06, 2022, 07:03:37 PM by farmboy2188 | Views: 72 | Comments: 3

Hey this is my first post, I have a 1987 Gmc v10 with the 350 tbi (2.02 heads mild hydraulic comp cam, dual plane intake) i was driving and when i stopped at a red light and applied throttle it started to knock bad almost like it’s detonating so i went home and did the usual when that happens change fuel filters flush the tank new fuel in with conditioner, make sure all the spark plugs have good spark change the coil and reset the timing to 0* the factory spec, i did all this and it’s still doing it so i made sure all the valves and rockers were in spec and it doesn’t have lifter tick so that’s fine but it starts great, and drives fine until it’s above 1800 rpm under load or you stomp on it so i’m lost what it could be any one have any ideas much appreciated?

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86 k10 spring question

December 05, 2022, 06:30:33 AM by project1 | Views: 74 | Comments: 1

I am upgrading my truck from a 454 to a 5.3l LS, it has a skyjacker 6 inch lift and rancho shocks all around with dual shocks up front. It’s a very firm suspension even when the 454 was in it now that I’m putting the lighter 5.3 in it could I possibly remove 2 springs from each pack to lessen the stiffness?

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