What really needs to be done at 100K?

[TaGroh]

I am about to hit 100k miles and of course the dealer gave me a list of over a dozen things that I should have done as far as recommended maintenance. I let them do a basic tune-up, fuel filter, oil change and serpentine belt. My miles are mostly highway commute miles and I have only trailered once. What else should I really do to keep the Hoe running well and avoid something costly later?

 

[73shark]

Welcome to the Tahoe Forum. Has the tranny fluid ever been changed? If not, there's some who say you shouldn't change it now due to seal leakage, etc. Probably wouldn't hurt to change the transfer case and both differential lubes.

 

[JKmotorsports]

I assume new plugs and wires were part of the tune-up? May also want to service the brake fluid. Most people neglect this. The fluid is hydroscopic, so it absorbs moisture, which is bad for the brake system. Moisture lowers the brake fluid's boiling point and can accel corrosion in the system.

 

[bigsexy408]

I recently did my own 100k service it was easy included pcv, fuel filter, plugs/wiresand that alone improved my mpg I plan to do a trans flush diff and coolant flush but that's about it my belt looks new with no cracking at all. The reason why people say not to do a trans fluid change is because tranny fluid is so detergent that often times when you flush it the new fluid cleans everything out and plugs the new filter. So what I'm going to is have a shop do it so if this does happen with my trans there responsible.

 

[TaGroh]

The tranny fluid has never been changed but I haven't touched the brake fluid. I have also heard that it may make sense not to mess with changing tranny fluid at ths point so I think I'll leave it. The basic tune-up was just plugs and wires. It sounds like the transfer and diff lubes sound like the best move at this point.

Would it be worth doing shocks? I have Autoride but it's not working and was quoted $1200 just to have the rear replaced (both sides). I test drove an 07 yesterday and loved the ride so I'm thinking if I hang onto the 03 it the suspension work may make a difference...

 

[brielly]

I disagree about the tranny fluid. Some shops say not to do a full tranny flush but as long the fluid looks good drop the pan, change the filter and get some new fluid in there.

 

[boostaholic]

1. Start Truck
2. Depress Brake and Shift Into 1
3. Depress Accelerator and Spin Tires
4. Turn off Ignition

Oh and plugs gapped to .040, diff fluids, tcase, trans pan drain and fill.

 

[TaGroh]

Here's the latest as I rolled past 100k this weekend ice fishing in the middle of Northern Wisconsin... and I am definitely no mechanic so bear with me. Apparently a fuel sensor/manager mounted under the drivers side inside the frame rail was impact damaged and cracked when my wife went into the ditch recently in hard packed snow/ice. It was enough damage that I had to submit a repair/body work claim which was fixed except for running boards that were backordered so the claim is still open. The truck was supposedly fixed but the damaged sensor went unnoticed and I took it up north for my trip. Because there was some corrosion in the busted sensor, the dealer felt it didn't just happen over the weekend and I didn't do any off-roading. The truck seemed fine on the way up and on Friday but didn't start Saturday or Sunday so I had it towed to a dealer in the nearest town 20 miles away. They pulled the sensor and found the damage on it and it turns out now my fuel pump was also shot and there was a vacuum leak in addition to the Oxygen sensor. The vacuum leak required 2 new gaskets on the intake. The garage feels that the bad fuel sensor likely caused the gaskets and maybe fuel pump to fry because the sensor got confused and started dumping extra fuel into the engine which pooled in the intake and melted the gaskets. I am going to take it back to the garage in town to take a look and try to confirm that the damaged they missed on the sensor did lead to some of the other issues. I am hoping this will happen which would I think should mean the open insurance claim might still cover some of the $2,000 repair bill I just racked up over the weekend. Do I have a chance? How should I play this? I kept the fried sensor, gaskets and Oxygen sensor just in case.