Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Harmonic Balancer - Crankshaft Pulley: Customer Interest
Engine - Belt Squeal/Pop Noise From Crankshaft Pulley
CHEVROLET NUMBER: 86-T-214
SECTION:
6 - Engine Diagnosis
DATE:
January, 1987
SUBJECT:
CRANKSHAFT PULLEY
MODELS:
1986 C, K, G, P 10/1500 - 30/3500 EQUIPPED WITH THE 4.3L (VIN CODE N), 5.0L (VIN CODE F, H) 5.7L (VIN CODE L, M, K)
Some 1986 C,K,G,P model trucks equipped with the 4.3L, 5.0L, 5.7L engines without air conditoning A/C) may experience a belt squeal or popping
noise from the crankshaft pulley area. These noises may be caused by a separation in the generator belt groove portion of the pulley. If this condition is
encountered, it can be repaired by replacing the pulley with a new design pulley. These pulleys were changed in production effective with the following
VIN breakpoints.
Model
Plant
VIN Breakpoint
C/K
Flint - Line 1
GMC 729913
Chevrolet 426588
Line 2
GMC 528408
Chevrolet 192683
St. Louis
GMC 530639
Chevrolet 119883
Janesville
GMC 511469
Chevrolet 128233
G Van
Lordstown
GMC 518113
Chevrolet 118449
Scarborough
GMC 525644
Chevrolet 163060
P
Detroit Assembly
GMC 503976
Chassis
Chevrolet 330510
PARTS INFORMATION
New
Part
Quantity
Number
Description
Application
Required
10069912
Pulley
C/K,1,2,3, 4.3L
1
(N) w/o A/C
C/F,1,2,3, 5.0L
1
(F,H) 5.7L (L,M)
w/o A/C
P2,3 5.7L (M,K)
1
w/o BM3, w/o A/C
10069913
Pulley
G1,2 4.3L (N)
1
w/o A/C, V05
G3 (03-05-06) 4.3L
1
(N) w/o A/C, V05
G1,2 5.0L (F,H)
1
5.7L (L) w/o A/C, V05
G3 5.7L (L,M)
1
w/o A/C, V05
