C 2500 Suburban 2WD V8-350 5.7L (1994)
Speedometer Head: Customer Interest
Speedometer - Momentary Drop With Flashers On
File In Section: 8 - Chassis/Body Electrical
Bulletin No.: 46-83-04
Date: October, 1994
Subject:
Speedometer Momentary Drop when Turning on Park Lamps, Turn Signals or Hazard Flashers (Send I/P Cluster to Delco Repair Station)
Models:
1993-94 Chevrolet and GMC Truck C/K Models
1994 Chevrolet and GMC Truck S/T Pickup Models
Condition
Some speedometers in the above vehicles may momentarily drop when the turn signal, park lamp, or hazard flasher is turned on. This condition often
occurs at speeds over 60 miles per hour.
Cause
Slight system voltage drop when the extra load from the lights is added.
Correction
Remove the instrument cluster and send it to the local Delco Repair Station. Repair stations are aware of the condition and have parts available to repair
the cluster. They will add a capacitor to the power circuit to assure a consistent power flow during power up of the above mentioned lamps. Be sure to
clearly describe the condition on the Delco Repair Order accompanying the cluster.
Warranty Information
For vehicles repaired under warranty, use:
