Availability: 6 in stock
The regulator here is the GM part, numbered 89058296. It is catalogued under Valves & Regulators > Regulators & Adjusters.
Replace the seals with the valve. The old O-rings will not seal twice, and a leak here is often blamed on the new part.
Confirm the number before you order, because a near match will bolt on and still be wrong. Send the VIN if the old marking has gone. Handed to the carrier within one to two business days from our US warehouse, free over $59.