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1990 Chevrolet C1500 454 SS 7.4L No Speed controller
Posted to GM Driveability on 10/25/2007 8 Replies

Perhaps someone has ran into a similar problem. This truck has intermittent speedometer function. Sometimes will work for 1 to 5 minutes after a cold start, sometimes won't. Alldata and Motor manuals show same circuit layout. This truck has the old TH400 trans...

8 Replies Received (View Replies)

  Related Documents & Media  1990 Chevrolet C1500 454 SS

 
Message Closed w/Summary

car Vehicle Data

1990 Chevrolet C1500 454 SS

VIN 1GCDC14N3L
Engine7.4 L / 8 cyl / GAS
Trans3-speed Automatic
DeliveryFI / TBI
EmissionsUS Fed
SymptomsNo Speed Controller
OccursAlways
Misc.454 Ss

Trouble Codes

24Vss signal
Message Closed w/Summary

car Vehicle Data

1990 Chevrolet C1500 454 SS

VIN 1GCDC14N3L
Engine7.4 L / 8 cyl / GAS
Trans3-speed Automatic
DeliveryFI / TBI
EmissionsUS Fed
SymptomsNo Speed Controller
OccursAlways
Misc.454 Ss

Trouble Codes

24Vss signal