Vettepilot
OBS Enthusiast
Well, I've been studying and researching this, and I'm stuck. Help??
As stated, it's a 1994 GMC K1500 4x4 extended cab with 5.7 engine that I'm fixing up and trying to get back on the road.
Latest problem is the speedometer. It is reading far too high; looks like around 35 mph is 55 plus on the gauge. It also sometimes jumps. This is an old, somewhat abused truck that I bought not running. I got it going, but have only driven it on a 6 mile test drive so far. So I know no history; only what it's doing now.
My research indicates three things, I think:
1. This is apparently a common problem.
2. It is often (usually?) the speedo head/gauge itself at fault.
3. 1994/1995 units are different/unique from other models?
There is a "You Pull the Part" type junkyard here, and they have several of them, but not 1994. (Mine has the tach, and these do too.)
Questions:
How do I determine if it is actually the speedo head at fault??
How do I find out which years will fit my 1994?? (The junkyard does not know, and does not accept returns.)
Do these have a finite life?? (The ones in the junkyard have 200, 000 to nearly 300,000 miles.)
Is there anywhere that rebuilds them??
Thanks guys!
Vettepilot
As stated, it's a 1994 GMC K1500 4x4 extended cab with 5.7 engine that I'm fixing up and trying to get back on the road.
Latest problem is the speedometer. It is reading far too high; looks like around 35 mph is 55 plus on the gauge. It also sometimes jumps. This is an old, somewhat abused truck that I bought not running. I got it going, but have only driven it on a 6 mile test drive so far. So I know no history; only what it's doing now.
My research indicates three things, I think:
1. This is apparently a common problem.
2. It is often (usually?) the speedo head/gauge itself at fault.
3. 1994/1995 units are different/unique from other models?
There is a "You Pull the Part" type junkyard here, and they have several of them, but not 1994. (Mine has the tach, and these do too.)
Questions:
How do I determine if it is actually the speedo head at fault??
How do I find out which years will fit my 1994?? (The junkyard does not know, and does not accept returns.)
Do these have a finite life?? (The ones in the junkyard have 200, 000 to nearly 300,000 miles.)
Is there anywhere that rebuilds them??
Thanks guys!
Vettepilot