1991 GMC Sonoma speedometer

1991 GMC SONOMA
200,020 MILES • 6 CYL • 2WD • MANUAL
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RYANGATTS
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  • 1 POST
my speedometer is electrical and cant figure out where to fix it. How can I solve this?
Mar 27, 2010 at 11:07 AM
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HMAC300
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  • 48,601 POSTS
you have an electrical speed sensor on the transmission. Have that checked or cross the A &B plug on the ALDL and see if it has set a code by counting the flashes. You can go to the site here for trouble code definitions an dlook under OBD1.
Apr 3, 2010 at 10:35 AM