Suburban 1/2 Ton 2WD V8-350 5.7L (1986)
Speedometer Cable: Customer Interest
Speedometer - Noisy or Inoperative
Number:
87-205
Section:
8C
Date:
August, 1987
SUBJECT:
NOISY OR INOPERATIVE SPEEDOMETER
MODELS:
1985-1987 C/K AND R/V 2,3 MODELS WITH 4.8L, 5.7L, OR 7.4L CARBURETED
ENGINES
FIGURE NO. 1
FIGURE NO. 2
Some 1985, 1986, and 1987 C/K and R/V model trucks may experience a noisy or inoperative speedometer. This condition may be caused by the
speedometer cable contacting the engine exhaust between the cable connection on the transmission or transfer case and the first cable clamp located on
the floor pan. If the contact occurs, the high exhaust temperature may damage the speedometer cable. A new design speedometer cable has been released
to repair this condition when found (See Figure No. 1 for K/V models, Figure No. 2 for C/R models). The new cable has a foam collar where it mates
with the first clamp, that when clamped, holds the cable in correct alignment and prevents cable droop. The new gray cable is also three
inches shorter than the black cable it replaces. Follow the procedure in Section 8C of the Light Duty Truck Service Manual to install the new cable.
