cooling

Coolant Reservoir

for 2014 Chevrolet Silverado 1500 5.3L V8 EcoTec3 L83 · RWD

Difficulty

Easy

Time

42 min

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

This procedure covers removal and replacement of the coolant reservoir (overflow tank) on a 2014-2018 Chevrolet Silverado 1500 with the 5.3L V8 EcoTec3 engine.

Warnings

⚠️Allow engine to cool completely before beginning work. Hot coolant can cause severe burns.

⚠DEX-COOL coolant is toxic. Dispose of used coolant properly according to local regulations.

⚠Do not mix DEX-COOL with other coolant types. Use only orange DEX-COOL coolant in this vehicle.

Tools required

8mm socket or wrenchEssential

Flathead screwdriver

Drain pan (2+ gallon capacity)Essential

Hose clamp pliers

Torque wrenchEssential

FunnelEssential

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Parts

Coolant reservoir × 1 — GM 22921281 or equivalent
Reservoir cap × 1 — Reuse unless damaged

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Fluids

ACDelco DEX-COOL (Orange) — 2 qt

Preparation

Park vehicle on level surface and allow engine to cool for at least 2 hours
Open hood and ensure engine is cold to touch
Remove reservoir cap slowly to release any residual pressure
Place drain pan beneath the reservoir area

Procedure

1
Drain coolant from reservoir
Use a fluid extraction pump or disconnect the lower radiator hose at the reservoir to drain coolant into the drain pan. If extracting, insert tube to bottom of reservoir and pump until empty. Alternatively, pinch and slide the hose clamp down the lower hose, then carefully pull hose from reservoir nipple.
2
Disconnect upper radiator hose
Locate the upper hose connection on top of the reservoir. Use hose clamp pliers or flathead screwdriver to reposition the clamp away from the reservoir nipple. Twist the hose gently while pulling to remove it from the reservoir. Expect some residual coolant spillage.
3
Remove reservoir mounting bolts
Locate the two mounting bolts securing the reservoir to the radiator support bracket on the passenger side of the engine bay. Use an 8mm socket to remove both bolts completely. Support the reservoir with one hand as you remove the second bolt.
Torque spec
Reservoir Mounting Bolts8 Nm (6 lb-ft)
4
Lift reservoir from mounting bracket
Carefully lift the reservoir straight up and out of the engine bay. The reservoir has a lower locating tab that fits into a bracket slot. Tilt the reservoir as needed to clear any obstructions. Drain any remaining coolant into the drain pan.
5
Install new reservoir
Position the new reservoir over the mounting bracket, ensuring the lower locating tab engages properly in the bracket slot. Align the upper mounting holes with the bracket. Insert both mounting bolts and hand-tighten initially.
Torque spec
Reservoir Mounting Bolts8 Nm (6 lb-ft)
6
Torque mounting bolts
Using a torque wrench, tighten both reservoir mounting bolts to specification in a cross pattern to ensure even seating of the reservoir against the bracket.
Torque spec
Reservoir Mounting Bolts8 Nm (6 lb-ft)
7
Reconnect radiator hoses
Push the lower radiator hose firmly onto the reservoir nipple until fully seated. Slide the hose clamp into position approximately 1/4 inch from the end of the nipple. Repeat for the upper hose. Ensure both hoses are fully seated and clamps are positioned correctly.
Torque spec
Hose Clamps5 Nm (4 lb-ft)
8
Refill cooling system
Using a funnel, pour fresh ACDelco DEX-COOL coolant into the reservoir until the level reaches the COLD FILL line marked on the side of the reservoir. Do not overfill. Install the reservoir cap securely.
9
Bleed cooling system
Start the engine and allow it to idle with the heater set to maximum temperature. Monitor the reservoir level as air purges from the system. Add coolant as needed to maintain proper level. Run engine until the cooling fans cycle on, then turn off engine and allow to cool. Recheck coolant level when cold and top off to COLD FILL line if needed.

Reassembly

Ensure all hose clamps are properly positioned and tight
Verify reservoir cap is installed securely to prevent pressure loss
Wipe down any coolant spills on engine components or frame

Verification

With engine cold, verify coolant level is at COLD FILL line on reservoir
Inspect all hose connections for signs of leakage
Start engine and bring to operating temperature, verify no leaks develop around reservoir or hose connections
Check that cooling fans activate normally and coolant circulates properly
After first drive cycle, recheck coolant level when engine is cold and top off if necessary