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Chevrolet Silverado / GMC Sierra. Manual - part 1059
Fig. 129: View Of Transmission Fluid Pressure Switch & Bolts
Courtesy of GENERAL MOTORS CORP.
10. Remove the valve body bolts which retain the transmission fluid pressure switch to the valve
body.
11. Remove the transmission fluid pressure switch.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 130: Inspection Areas On Transmission Fluid Pressure (TFP) Manual Valve
Position Switch Assembly
Courtesy of GENERAL MOTORS CORP.
12. Inspect the transmission fluid pressure manual valve position switch assembly for the
following conditions:
Damage
Debris
Damaged or missing O-rings
Cracked connector
Loose electrical terminals
Poor terminal retention
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Fig. 131: Identifying Manual Detent Spring
Courtesy of GENERAL MOTORS CORP.
13. Remove the manual detent spring bolt.
14. Remove the manual detent spring.
15. Inspect the manual detent spring for cracks or damage.
IMPORTANT: Keep the valve body level when lowering it from the vehicle.
This will prevent the loss of checkballs located in the valve
body passages.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
16. Remove the remaining valve body bolts.
Fig. 132: View Of Valve Body To Transmission Case
Courtesy of GENERAL MOTORS CORP.
17. Carefully lower the valve body from the transmission case while simultaneously
disconnecting the manual valve link.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
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