Quick answer: Fuel Pump Replacement on a 2005–2010 Pontiac G6 is rated Advanced and takes about 2-3 hours. You'll need 5 tools for this job, and parts cost about $590. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| Fuel Pump Assembly |
ACDelco 217-3023 |
$500.00 |
|
| Fuel Tank Seal |
Dorman 800-015 |
$20.00 |
|
| Fuel Tank Strap |
Dorman 578-001 |
$30.00 |
|
| Fuel Tank Lock Ring |
Dorman 800-001 |
$25.00 |
|
| Fuel Filter |
ACDelco GF653 |
$15.00 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Relieve fuel pressure and disconnect power
Work outdoors or in a well-ventilated area — no sparks or open flame. Relieve fuel-rail pressure on the Pontiac G6 per the service manual (often by pulling the fuel-pump fuse/relay and cranking briefly). Disconnect the negative (−) battery cable. Have a Class B extinguisher nearby.
🔧 Mechanic's note — Tom Becker
I've learned: have that Class B extinguisher within arm's reach, not in the garage corner. Fuel vapors don't give warnings — you want it where your hand lands without thinking.
2
Access the fuel pump module
Most vehicles use an in-tank pump reached through an access panel under the rear seat or trunk carpet; others require dropping the tank. Clear the access area, support the tank if lowering it, and keep a drain pan ready for spilled fuel.
3
Disconnect lines and electrical connector
Unplug the pump/sending-unit connector. Release the quick-connect fuel lines with the proper disconnect tools — expect some spillage. Cap open lines to keep debris out.
4
Remove the lock ring and lift the module
Clean dirt away from the lock ring first so it cannot fall into the tank. Use a brass punch or lock-ring tool to rotate the ring free. Lift the pump module straight up, angling carefully past the float arm. Note clock orientation.
5
Transfer parts and install the new pump
Compare the new module/pump assembly. Transfer the fuel-level sender, strainer/sock, spacers, or lock ring if required. Install a new tank seal/O-ring lightly lubricated with clean fuel or the specified grease — never reuse a flattened seal.
🔧 Mechanic's note — Ray Delgado
I've learned never to reuse that tank seal — a flattened O-ring is the classic fuel-smell comeback. Lubricate the new one lightly with clean fuel and seat it dead even.
6
Seat the module, repressurize, and leak-check
Lower the module in the correct orientation, seat the seal evenly, and tighten the lock ring fully. Reconnect fuel lines until they click and plug in the electrical connector. Reconnect the battery, prime the system, inspect for leaks, then start and confirm stable running.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Not relieving fuel system pressure before starting the repair
- • Failing to disconnect the vehicle's battery before working on the fuel system
- • Overlooking the need to replace the fuel tank seal during reinstallation
