Disc Brake System & Drum Brake System: Specifications — Disc Brake System & Drum Brake System — Mechanical - Hydraulic

Disc Brake System & Drum Brake System: Specifications GMC Pickup C3500

TORQUE SPECIFICATIONS

Application					Ft. Lbs. (N.m)
Axle Shaft-To-Hub Bolt (9 3/4" & 10 1/2" Ring Gear)					115 (156)
Caliper Guide Pin (Floating Caliper)
"C" & "K" Series					28 (38)
Except "C" & "K" Series					37 (50)
Caliper Support Key Bolt (Sliding Caliper)					15 (20)
Differential Cover Bolt					20 (27)
Front Brake Hose-To-Caliper Bolt					32 (43)
Pinion Shaft Lock Bolt (1)					25 (34)
Rear Wheel Bearing Lock Nut
9 3/4" & 10 1/2" Ring Gear					65 (88)
12" Ring Gear					250 (339)
Wheel Lug Nut
Astro, Bravada & Safari					90 (122)
Lumina APV, Silhouette & Trans Sport					100 (136)
"C" & "K" Series
With Dual Rear Wheels
Light Duty					140 (190)
Heavy Duty					175 (237)
With Single Rear Wheels					120 (163)
"G" Series
G15 & G25					100 (136)
G35
With Dual Rear Wheels					140 (190)
With Single Rear Wheels					120 (163)
"P" Series
With Dual Rear Wheels
8 Lug					140 (190)
10 Lug					175 (237)
With Single Rear Wheels
5 Lug					100 (136)
6 Lug
Aluminum Wheels					100 (136)
Steel Wheels					88 (119)
8 Lug					120 (163)
"S" & "T" Series Except Bravada
With Aluminum Wheels					90 (122)
With Steel Wheels					73 (99)
(1) Use NEW pinion shaft lock bolt. DO NOT reuse bolt.

(1)	Use NEW pinion shaft lock bolt. DO NOT reuse bolt.

TORQUE SPECIFICATIONS

Application				In. (mm)
Astro, Safari & "S" & "T" Series
Drum
Original Diameter				9.50 (241.3)
Discard Diameter				9.59 (243.6)
Maximum Refinish Diameter				9.56 (242.8)
Width				2.00 (50.8)
Lumina APV, Silhouette & Trans Sport
Drum
Original Diameter				8.86 (225.0)
Discard Diameter				8.91 (226.3)
Maximum Refinish Diameter				8.89 (225.8)
Wheel Cylinder Diameter				.748 (19.00)
All Others
Drum
Original Diameter
10.00" Drum				10.00 (254.0)
11.15" Drum				11.15 (283.2)
12.00" Drum				12.00 (304.8)
13.00" Drum				13.00 (330.2)
Discard Diameter
10.00" Drum				10.09 (256.3)
11.15" Drum				11.24 (285.5)
12.00" Drum				12.090 (307.09)
13.00" Drum				13.09 (332.5)
Maximum Refinish Diameter
10.00" Drum				10.05 (255.3)
11.15" Drum				11.21 (284.7)
12.00" Drum				12.060 (306.32)
13.00" Drum				13.06 (331.7)
Width
10.00" Drum				2.25 (57.0)
11.15" Drum				2.75 (69.9)
12.00" Drum				(1)
13.00" Drum				2.50 (63.5) Or 3.50 (88.9)
(1) Information is not available from manufacturer.

(1)	Information is not available from manufacturer.

DRUM BRAKE SPECIFICATIONS

Application					In. (mm)
Lateral Runout
All Models					.004 (.10)
Parallelism
All Models					.0005 (.013)
Original Thickness
Astro & Safari					1.04 (26.4)
Lumina APV, Silhouette & Trans Sport					1.043 (26.49)
"S" & "T" Series					1.03 (26.2)
All Others
11.57" Rotor
4600 Lbs. GVW					1.00 (25.4)
6400 & 7200 Lbs. GVW					1.25 (31.8)
11.86" Rotor					1.29 (32.8)
12.50" Rotor
"C" & "K" Series					1.26 (32.0)
Except "C" & "K" Series
8400 Lbs. GVW					1.28 (32.5)
10,000 Lbs. GVW					1.54 (39.1)
13.75" Rotor					1.54 (39.1)
14.25" Rotor					1.54 (39.1)
Minimum Refinish Thickness (1)
Astro, Safari & "S" & "T" Series					.980 (24.89)
Lumina APV, Silhouette & Trans Sport					.972 (24.69)
All Others
11.57 X 1.00" Rotor					.980 (24.89)
11.57 X 1.25" Rotor					1.230 (31.24)
11.86 X 1.29" Rotor					1.230 (31.24)
12.50 X 1.26" Rotor					1.230 (31.24)
12.50 X 1.28" Rotor					1.230 (31.24)
12.50 X 1.54" Rotor					1.480 (37.59)
13.75 X 1.54" Rotor					1.480 (37.59)
14.25 X 1.54" Rotor					1.480 (37.59)
Discard Thickness
Astro, Safari & "S" & "T" Series					.965 (24.51)
Lumina APV, Silhouette & Trans Sport					.957 (24.31)
All Others
11.57 X 1.00" Rotor					.965 (24.51)
11.57 X 1.25" Rotor					1.215 (30.86)
11.86 X 1.29" Rotor					1.215 (30.86)
12.50 X 1.26" Rotor					1.215 (30.86)
12.50 X 1.28" Rotor					1.215 (30.86)
12.50 X 1.54" Rotor					1.465 (37.21)
13.75 X 1.54" Rotor					1.465 (37.21)
14.25 X 1.54" Rotor					1.465 (37.21)
(1) Use specification stamped on rotor (if available).

(1)	Use specification stamped on rotor (if available).

DISC BRAKE SPECIFICATIONS