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A good tire shop will have a torque wrench and a not good one will not ask before you let them touch your unit. Too tight or to loose is unsafe. I have my own 3/4 drive wrench and a local truck shop with a wall mounted tester that I check it on.

You got a bad rep on the phone. Have them repeat the location back to you next time. I had good luck with them.

Most people that keep spare bulbs wonder why the bulbs some times do not last long If you keep spare bulbs store so they can not bounce IE tape down or wrap so the vibration will not shorten there life

You need to check your gauge as well.

After you have made sure every thing is clean IE evaporator and drain and it still does it at night after a rain and not during it could be slightly low on charge so when it cools out side the unit will freeze at start of the coil because the cool condenser has lower pressure which will allow the freon to vaporise and ice up one end

The program down shift is normally to fourth if you manually shift to third it will stay in third unless the motor is over speed then it will shift up to protect engine

The pressure switch getting bad

Do you have a pure sine converter or modified sine A lot of things do not like the modified sine

All our cats loved to camp and we had one that would beat us into the unit. It loved to travel and be with us. Now we are getting a new on that will be ready to leave the mom and learn to travel in 6 weeks.

The rigs built for 80,000 have twin screws to pull the load and likely lower gears. It looks to be a relatively safe way to haul more.

The hitch is only part of the reason for a max tow weight: motor, transmission, axles, brakes, frame, tires... Be safe-- stay below the max.

Poor power, bad capacitor stuck TXV bad bearings-- you need to be more specific of the noise or have some one look at it

I almost sounds like you have low voltage or bad capacitors on you units start up amperage should not be that high.

I had an old neighbor that was running Cat and was talking about the truckers that idled there motors a lot and would drop valves So I have always tried not to idle any motor. When you start it drive it slowly as soon as you have oil and air pressure and always heat it up.

On a lot of GM's it is the oil pressure switch that runs the fuel pump relay after the time out on start so it could also be low oil pressure

The average GM in tank pump is good for 6 or 7 years and or 100,000 miles and less if you run your tank empty a few times check wiring if all good put a new pump in. And hope you don't have a full tank.

I believe it is best to mix water with the antifreeze before installing it in a 60 to 70% then top up with water as pure antifreeze can and will destroy the water pump seal if enough water does not get mix with the antifreeze when you start it back up

Enjoy your travels and don't look and what the other traveler is carrying.

If you need to boost your rig from a car or truck: Hook the cables up and let you boost rig surface charge the battery's for 20 to 30 minutes. Shut off boost vehicle so not to damage electronics from voltage spike then start your rig.

It also could be the accumulator for the antilock and traction control has bled down and lowers the available assist until the unit is operated for a short time

My manual tells me to depress the throttle and release before starting then let the ECU do its thing. That is for a 1999 3126 Cat

Mine comes on for a short time at 70F ambient and longer the colder it gets. About the only time it does not come on is warm restart.

Different size tires front to back

Transport trucks should be doing the filters every year and we should be every two to three years. and again how you use it and where you go

Use an equalizer hitch to spread the load to the front after you deal with the other limiting factors