Sierra Classic 2500 4WD V8-8.1L (2007)
13. Inspect the transmission fluid pressure manual valve position switch assembly for the following conditions:
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Damage
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Debris
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Damaged or missing O-rings
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Cracked connector
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Loose electrical terminals
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Poor terminal retention
14. Remove the manual detent spring bolt.
15. Remove the manual detent spring.
16. Inspect the manual detent spring for cracks or damage.
17. 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.
Remove the remaining valve body bolts.