Timing On 1988 Gmc 1500 / 5.0

[dmcquilling]

Anyone know the timing setting on a 1988 GMC 1500 with a 305 (5.0)? Sticker is missing and no help through google. Know to disconnect wire at firewall but don't know the setting. Have found one post that says to set at 0 but that seems strange. Thanks - David

[redvett]

Yes all TBI engines 305 & 350 from 1987 to 1995 are set at zero with EST wire disconnected with engine at operating temp in "N"

 

Anyone know the timing setting on a 1988 GMC 1500 with a 305 (5.0)? Sticker is missing and no help through google. Know to disconnect wire at firewall but don't know the setting. Have found one post that says to set at 0 but that seems strange. Thanks - David

[dlewis1111]

+1 had a 1991 and sticker said 0 with the wire disconnected

[pennzoil29]

Yes all TBI engines 305 & 350 from 1987 to 1995 are set at zero with EST wire disconnected with engine at operating temp in "N"

 

Anyone know the timing setting on a 1988 GMC 1500 with a 305 (5.0)? Sticker is missing and no help through google. Know to disconnect wire at firewall but don't know the setting. Have found one post that says to set at 0 but that seems strange. Thanks - David

 

 

 

 

+1 had a 1991 and sticker said 0 with the wire disconnected

 

What they said.