V 3500 P/U 4WD V8-350 5.7L VIN M 4-bbl (1987)
FIGURE 2 - C/K, R/V, M, G MODELS
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ON C/K, R/V, M OR G MODELS - the condition may be caused by fan clutches that have mismachined housings. If this condition is encountered,
the fan clutch should be removed and the date code checked (See Figure No. 2). Use the service procedures in Section 6B-Engine Cooling of the
appropriate service manual. Fans built between Julian Date codes 07987 (079- March 20, 1987) and 11787 (117 - April 27, 1987) should be
replaced. New parts received from GMSPO should also have the date codes checked to insure a good part is installed.
PARTS INFORMATION
Part Number
Application
22073412
1987-88 M Van with 4.3L, with
A/C without GT4
22073403
1988 C/K with 4.3L with
GU2/GU4/GU6 and KC4/VO1/VO2/A/C 5.7L with GU4/GU6 and KC4/VO1/VO2/A/C 1987-88 G Van with 4.3L, 5.0L,
5.7L (Vin Code K) with heavy duty cooling and without GT4
22068662
1988 C/K with 5.0L with
GU2/GU4/GU6 without A/C
22049776
1987-88 R/V with 5.0L, 5.7L with
A/C, without GT4
New parts received from GMSPO that fall within the date code break points listed above should be returned to the local GMSPO warehouse for credit
with an attached copy of this bulletin. Use Labor Operation J3390 when performing these repairs.
Labor Times:
S/T - .4 hr.
C/K
-
.3 hr.
R/V
-
.3 hr.
G
-
.4 hr.
M
-
.5 hr.