Factory schedule maintenance--scam???

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Nov 20, 2025 | 06:32 PM

Meatloaf

Thread Starter

Junior Member

Joined: Nov 2025

Posts: 1

Factory schedule maintenance--scam???

2007 Hummer H2 Sport Utility--Have 109,000 Miles Runs great! Garage is telling me I need Factory Schedule Maintenance of: Tune Up(replace spark plugs and ignition wires, fuel induction service); change transmition fluid; Drivetrain Fluids(Front Rear Differential Drive Line System Services, Transfer Case Fluid(change fluid). Do I need any of these? Appreciate your reply, GAK

Nov 20, 2025 | 07:20 PM

bronxteck

Senior Member

Joined: Apr 2019

Posts: 3,181

From: BX NY North East

if you havent done any of them then you probably need them. you can do them all yourself.

Nov 20, 2025 | 07:35 PM

hummerz

Senior Member

Joined: Jul 2012

Posts: 8,907

From: C-Town

A 2007 Hummer H2's 100,000-mile maintenance should include
replacing the spark plugs, all filters (engine oil, air, and transmission), and flushing all fluids (engine oil, transmission fluid, transfer case fluid, and coolant). It's also critical to inspect and service key components like the brakes, steering and suspension system, and drive belts and hoses for wear, as well as rotate the tires. Engine and fluids

Engine oil and filter: Change the engine oil and filter.
Spark plugs: Replace the spark plugs.
Air filter: Replace the engine air filter.
Transmission fluid: Drain and replace the automatic transmission fluid and filter.
Transfer case fluid: Change the transfer case fluid.
Coolant: Inspect the coolant and consider a flush and replacement if it looks contaminated.
Brake fluid: A flush is recommended around this mileage.

Inspection and service

Brakes: Inspect the entire brake system, including pads and rotors.
Steering and suspension: Check for wear in components like ball joints, bushings, and other suspension parts.
Exhaust system: Inspect the exhaust system for any issues.
Fuel system: Check the fuel system.
Drive belts and hoses: Inspect for signs of wear and cracking.
Tires and wheels: Rotate the tires and adjust air pressure.
Body and chassis: Perform a thorough inspection of the body and chassis.

Other checks

Windshield wipers and washer fluid: Inspect wipers and check the washer fluid level.
Shift linkage: Inspect the shift linkage.

Nov 21, 2025 | 02:02 PM

Doc Olds

Super Moderator

Joined: Jul 2007

Posts: 13,056

From: Boat Town USA MI

In order to answer your question we would need to know when you last did a Tune Up(replace spark plugs and ignition wires, fuel induction service); change transmission fluid; Drivetrain Fluids(Front Rear Differential Drive Line System Services, Transfer Case Fluid(change fluid).

As was said, if never, yeah you need all of that. If you did some of the items at like 75K miles, then those might be able to wait a while.