How to replace the coolant reservoir on GMC Envoy?

Beginning the Coolant Reservoir replacement process starts by taking off the proper engine type's air cleaner assembly. First disconnect the electrical connector from the a/c pressure switch then remove the bracket bolt holding the accumulator to the reservoir. Finally move the accumulator to a safe position. First remove the coolant hoses from the Coolant Reservoir before plugging the hoses and reservoir outlets with suitable plugs. To perform the removal keep the bolt and nut isolated from the Coolant Reservoir before pulling it out. Install the new Coolant Reservoir by placing it into position while strictly adhering to fastener caution instructions. Follow this procedure when installing the Coolant Reservoir bolt by tightening it to 12 nm (106 lb in) then install and torque the reservoir nut to 10 nm (89 lb in). Reconnect the Coolant Reservoir hose then secure the accumulator bracket with its bolt while applying 10 nm (89 lb in) torque. Finish by connecting the a/c low pressure switch electrical connector. Reinstall the air cleaner assembly according to the engine type requirements.

OEM GMC Envoy Coolant Reservoir

Coolant Tank Reservoir

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GMC Envoy Tank Part Number: 52487854
$35.43 MSRP: $75.00
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Product Specifications
- Other Name: Tank, Radiator; Coolant Reservoir
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Transmission Cooler Part Number: 89022555
$27.26 MSRP: $158.73
You Save: $131.47 (83%)
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Product Specifications
- Other Name: Tank; Tank Kit, Radiator
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS
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GMC Envoy Transmission Cooler Part Number: 89022552
$115.28 MSRP: $172.32
You Save: $57.04 (34%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Tank; Tank Kit, Radiator
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy Reservoir Tank Part Number: 25780737
Product Specifications
- Other Name: Reservoir, Coolant Recovery; Coolant Reservoir; Reservoir; Reservoir, Engine Coolant Recovery
- Replaces: 15884833, 15144777, 15762761
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 GMC Envoy | Denali, SLE, SLT | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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GMC Envoy Tank Part Number: 52494732
Product Specifications
- Other Name: Tank, Radiator; Coolant Reservoir
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 GMC Envoy | Denali | 8 Cyl 5.3 L GAS

GMC Envoy Coolant Reservoir

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Incorporated in the engine cooling system, the Coolant Reservoir of GMC Envoy cars helps avoid situation in which there is spilling of coolant on the ground and there is presence of air in the system. There are two main types of Coolant Reservoirs used in Envoy vehicles: and two are commonly referred to as overflow tank systems and expansion tank systems. In the overflow system, coolant drains from the radiator to the recovery tank when pressure goes beyond the rated cap pressure while in the expansion system the tank is considered to be under pressure with pressure and contains the expansion of the coolant as well as the contraction. It is advised that Coolant Reservoir be subjected to frequent inspection to see that the there are no cracks, leaks or signs of deterioration.

GMC Envoy Coolant Reservoir Parts and Q&A

Transmission Cooler
89022552
Q: How to replace the coolant reservoir on GMC Envoy?
A:
Beginning the Coolant Reservoir replacement process starts by taking off the proper engine type's air cleaner assembly. First disconnect the electrical connector from the a/c pressure switch then remove the bracket bolt holding the accumulator to the reservoir. Finally move the accumulator to a safe position. First remove the coolant hoses from the Coolant Reservoir before plugging the hoses and reservoir outlets with suitable plugs. To perform the removal keep the bolt and nut isolated from the Coolant Reservoir before pulling it out. Install the new Coolant Reservoir by placing it into position while strictly adhering to fastener caution instructions. Follow this procedure when installing the Coolant Reservoir bolt by tightening it to 12 nm (106 lb in) then install and torque the reservoir nut to 10 nm (89 lb in). Reconnect the Coolant Reservoir hose then secure the accumulator bracket with its bolt while applying 10 nm (89 lb in) torque. Finish by connecting the a/c low pressure switch electrical connector. Reinstall the air cleaner assembly according to the engine type requirements.