If im understanding correctly you are saying that there are 4 layers asphalt and 1 wood? If thats the case it doesn't matter where you live I can tell you that is not code. The absolute most I have ever seen is three comp and 1 wood. That is a lot of weight on your roof. If you live where you will see snow this year I'd have that looked at for safety reasons.
GOOGLE HOW TO BLEED BRAKES
YOUTUBE.
THERE ARE MANY WAYS
LIKE FACTORY PRESSURE BLEED WAY!!!!!
GRAVITY BLEED,
VACUUM BLEED.
or there 100 year way, 2man foot and zerk like fitting open close way. at each caliper.
Pump up foot,valve open, bleeds, close valve , foot up.
repeat tell your eyes glaze over.bored.
Some cars you need ABS tool to go to bleed mode.
If the 4WD service light comes on when you start your Hummer H2, it could indicate a problem with the four-wheel drive system. This warning light could indicate a problem with the transfer case, the drive shaft, the front or rear differential, or other components of the 4WD system.
It is recommended to take your vehicle to a certified mechanic or a Hummer dealership for proper diagnosis and repair. The service light coming on could be a sign of a serious problem, and it is important to address it promptly to avoid further damage to your vehicle and ensure safe operation.
i know you said you have flushed through the sunroof drain channels , have you actually cleared all four out let tubes , one ine each corner of sunroof tray ,there are rubber tubes from these outlets tath emerge at the wheel arches behind inner arch covers its ussually the back ones that get forgotten ,a good tool to use is a flexible domestic pipe cleanring rod ,used by plumbers for sink blockages etc let me know if this was of any help cheers
There are some possibilities that you will have to get checked.
Possible causes..... 1. HVAC Control Module needs recalibration. 2. Control Head needs replacing. 3. Refrigerant System leak.4) The blower door actuator.the blower door actuator. The HVAC system under the passengers dash, to access it remove the cover below the glove compartment, 2 screws. The drivers blower door actuator motor is closest to the transmission tunnel and is held in place with 2 screws. The Passenger blower door actuator is directly above it on the TOP of the housing. Remove the glove compartment and you can get to it on the top of the HVAC system. Reach up and unplug it and plug it back in first. if it does not correct it you will need to replace it. It is not an easy job since most of the dash must be removed. Start by removing all the decorative allen bolts accross the dash. The center section can be pulled forward an inch or so. This will allow you to remove the trim around the speedometer cluster and drivers a/c vent. The passengers side is a little tricky. You need to remove the side panel that rests up against the door panel. Shine a light in at the upper left corner and you will see a white button aprox 1/8" wide and 1/2" tall this needs to be pushed in with a flat blad screwdriver while gently pulling out on the passenger grab bar(above the airbag). The second white button can be reached throught the far left glove compartment opening. I reached up and pushed in on the white button on this side while pulling out on the handle. This will allow the handle to be removed and the trim peices following. You can now see the screws that hold the upper dash cover there are aprox 3 screws on the driver and passenger side. You also have 2 in the center behind the center trim piece pull forward an inch or so and a 1/4" drive socket will get to the screws here. It then just pulls straight forward NOT UP. and don't forget to unplug the sun sensor on the dash. Remove the clip holding the duct work you will now see is connected to the backside of the dash passengers side. You can secure it from the outside when reassembling. The acctuator can be seen and replaced. It is still tight but I did not have to take it to the dealer. You have 3 actuators on the H2 that is Drivers side, Passenges side, and recirculate. I would suggest whil you are under the dash remove the blower motor (3 screws and clean out the fan shoot some compressed air in to get any other dust out.).if in your ac system you are using dual control system then,The heater control valve has failed and is open allowing the passenger side heater core to stay hot. It is a very common problem and expensive to repair. It tends to be an intermittent problem and sometimes will work properly. The heater control valve needs to be checked. Dual Climate Control Valve (DCCV) is failed. If the heater valve is checked ok then the other possibilities which can make this problem occur are. the blend door and the blend door actuator.Either the blend door is got craked or getting blocked or the actuator is got broken. Thanks. keep updated for any more query.you can rate this solution and show your appreciation.
no info generic answer no by-pass have vehicle scanned for trouble code ----how did you evaluate that problem is security ---failing ignition switch -fuel filter/pump -- failing sensor loose or damaged wire and about 50 more reasons check and test first 3 to narrow down to electrical or fuel problem
Taking to a qualified repair shop that has a factory tech 2 scan tool or some other type of professional scanner that can read codes in the HVAC control module would be a good place to start . Then reading how the system works . This system can set a number of DTC'S - diagnostic trouble codes .
DTC B0159
DTC B0164
DTC B0174, B0179, B0510, or B0515
DTC B0183 or B0188
DTC B0229, B0414, B0424, or B3770
DTC B0263, B0268, B0408, or B0418
DTC B1375
DTC P0530
Do you know what a DTC is ?
More then likely it's a problem with the blower motor control processor . It's all electronically controlled .Watch this video
https://www.youtube.com/watch?v=6YiCjnjLKH8&t=83s
From that description, sounds like you have a short in the wiring around the steering column / dash areas and I'm sure you have tilt steering in that hummer. Do the lights blink on and off when you use the tilt at all? Since they have stopped all together, first I would check all fuses and replace all that are blown if any. Then I would start looking around where the steering column pivots for tilt for any wires rubbing and/or pinching together and look for "raw" spots on the wires in the harness. Once they are located if any are worn, broken or bare, mend them and if available, use heat shrink to seal against future outbreaks :o) I hope this helps in your repairs. Jesus loves you, John 3:16-17 (KJV)
You will get your solution and all info on service info, repair info, parts info, wiring/electrical/fuse diagrams, error/fault codes, torque specs, PCV, , owner's/service/repair/parts/maintenance manuals etc everything
this website www.reliable-store.com
it's a very good website for vehicle problems even as old as 1991 ford..
My personal suggestion would be to go for these repair catalogs. I know this website www.reliable-store.com that i used to buy them from, and they sold online it was very good
manual. Go ahead, I bet.
If you're finding it difficult to service/repair your car, get one of those online manuals. You'll not have to wait for others to answer, or rely on mechanics and all. Plus i know a website that sells very cheap but very very good
manuals online, without expiry i.e. for lifetime. www.reliable-store.com
The Switch in the Door Panel is burned out,, order a new one, it's easy to put in,, pull panel, unplug switch and remove,, plug in new one and put panel back on !
