V 3500 P/U 4WD V8-350 5.7L VIN K TBI (1988)
Cruise Controller: Customer Interest
Cruise Control - Tap Up or Tap Down Response
GMC NUMBER:
88-T-201
GROUP:
9 - Accessories
DATE:
February, 1989
CORPORATE
NUMBER:
869004
SUBJECT:
CRUISE CONTROL - "TAP UP OR TAP DOWN RESPONSE"
MODELS:
1988 R/V 1, 2 SUBURBAN/JIMMY WITH 5.7L (L05) OR 7.4L (L19) ENGINES AND CRUISE CONTROL (K34)
Some 1988 R/V Suburban/Jimmys within the VIN breakpoints listed below, equipped with 5.7L or 7.4L gasoline engines and cruise control may exhibit
a condition involving cruise control response. Acceleration several mph more than expected may occur when the driver uses the Tap-up or Tap-down
cruise modes. This may be caused by voltage transients induced during engine start. A cruise control module which is less susceptible to negative voltage
transients has been released.
Vehicles Involved
1988 GMC Suburban/Jimmys equipped with 5.7L or 7.4L engines and cruise control (K34) built within the following VIN breakpoints:
From
Through
GMC
JF510956
JF534128
FIGURE 1
Service Procedure
Cruise control module replace. Refer to Figure No.1.
1.
Disconnect cruise harness (121).
2.
Disconnect module assembly (116) by prying back the retaining dip on the bracket and sliding the module out.
3.
Install new module P/N 25110868.
4.
Connect cruise harness.
Parts Information
Part
Part Number Quantity
Cruise control module
25110868
1
Parts are currently available from GMSPO.
