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Here's the description from the 4L60-E overview:
ADAPTIVE SHIFT CONTROL
The 4L60-E uses sophisticated electronics to modify shift patterns as conditions dictate. The Powertrain Control Module (PCM) monitors factors such as throttle position, vehicle speed, gear range, temperature and engine load. The PCM also measures changes in the operating condition of the vehicle, which occur naturally over time as components wear. Based on these measurements, shift timing and hydraulic line pressure are adapted to maintain optimum shift feel under different conditions - for example, during heavy hauling or trailering. This results in improved drivability and fuel economy. The PCM also allows the system to self-adjust for minor variations in each new unit, ensuring that every customer experiences consistent performance, and ensuring that the transmission will produce a constant high level of performance for the life of the car.
RealMoney says it's not selling cars and trucks that's the problem but funding health care. Although I don't have a subscription so I wasn't able to read anything but the abstract.
GM & Ford also have financing arms and other assets they can sell - Ford can cash out Hertz for example. Interesting times - Chinese motors are winding up in Equinoxes. (Inside Line)
Steve, Host
Thank You for your input
The clunking noise, is the front swaybar links, they get loose and clunk, get it fixed or buy the part and do it yourself this is not a hard fix. But it is an annoying noise.
The trailblazer is holding up well. Mileage is still around 17MPG 50/50
This is in my GM 2002 service info. I think the same would work on a 2004.
Document ID # 793757
Tech 2 Information on 4L60-E Shift Adapts (Clearing Shift Adapts)
#01-07-30-018 Issued 04-18-2001
2002 Chevrolet Trailblazer
2002 GMC Envoy
2002 Oldsmobile Bravada
with 4L60-E Automatic Transmission (RPO M30)
and 4.2 L Engine (VIN S -- RPO LL8)
The above listed vehicles have PCM software that does not allow the Tech 2 to display or clear shift adapts. Even though the shift adapts will not display, they will function as expected. Since the shift adapts modify line pressure, it is required to clear them during a significant transmission repair.
Important
If the adapts are not cleared, the customer may comment on either soft or harsh shifts after a major repair.
To clear the shift adapts, it is necessary to disconnect power to the Powertrain Control Module (PCM) for 35 minutes. Refer to the Powertrain Control Module (PCM) Replacement procedure in the Service Information.
I took everything off this spring and took to the local paint shop for a blast and repaint. Everything back on now and I'm a happy camper with $200 less in my pocket.
When the tail light cages were painted the bodyshop removed the lens tape anchors. The nice folks at WAAG mailed me 4 replacements for free.
I did write them to tell them about the "indestructible" powder coat that is not!!
They thanked me for the feedback and supplied the parts.
Greg
The cruise on my Envoy didn't work on the way home. Come to find out the brake lights are stuck on again and won't let the cruise work. Drive it right to the dealer. They have no brake light switch in stock and want to talk to tech services as this is the 2nd time this has happened. They arrange for a loaner. The rental company comes to pick up someone else but forgets me. Finally, they come back and get me. I get to the rental car company where they tell me they can only give me a GM vehicle as that is all GM will pay for. They are out of GM vehicles except for a 1 ton Chevy cargo van. Guess what I get, a flower delivery vehicle. Guess who's vehicle shopping this upcoming weekend.............enough is enough.
GAM
gmfan
It get's so hot from being on all the time I'm surprised it doesn't start a fire.
This whole situation is extremely frustrating. GM replaced my Bravada with the Envoy because of numerous problems and this one isn't much better. I expect more from a $38K vehicle. No complaints with the dealer. They have been good to work with. I'm jealous of all you out there with good ones!
GAM
GAM
Also I thought the Dodge Durango had problems with the front upper ball joints coming apart, with the potential of a wheel falling off as a result. As I recall from the news coverage, a defect Daimler-Chrysler tried to ignore. Worn stabilizer bar links making noise do not pose a hazzard to your life, like a wheel falling off. When Trailblazers were first sold in 2001, GM recognized a suspension problem right away and fixed the problem before anyone got hurt and NHTSA had to force the issue.
do a recall on my vehicle for tail lights/brake lights that would not go on when they can't figure out how to make mine go off? They announced another recall today for the triplets because the turn signal may activate both sets of lights (looks like your hazards are on). This is simple stuff that should have been perfected 50 years ago!
On another, funny note, when I told 7 or 8 people here at work that my loaner was the official car of AARP, they ALL said "you must be driving a Buick". Now there's a reputation I'd like to have. I bet GM goes bankrupt in less than 5 years.
GAM
GM should follow the carpenters rule, measure twice cut once.
I responded to macatowa with 60,000 miles. At 20k, those should have been covered by your warranty. Of course these should not normally need replacement at only 20k miles; that's what the warranty is for.
Aftermarket replacement parts- why not, if they are possibly improved or have something you miss, like grease fittings. Moog-Federal Mogul makes a lot of OEM parts BTW. Stabilizer bar links and bushings, like brake pads and tires, will wear out eventually, some sooner, some later, depending on how and where you drive.
I would be cool if we could figure out how to add a button on the dash of the Rainier AWD units to lock them into 4WD. Anyone have a shop manual and knowledge to look at this issue. I also just call the transfer case company, now Magna Drivetrain and they let me leave a message with the sales department for someone to call me.
I wonder if others are using this 126 transfer case with better results.
Little afraid at this point to send my wife up skiing with the reports I have read about it.
SNOKING
BTW my dealer had not heard of too many links failing but he could fix me up for a mere $500. I'm having a private mechanic fix it for less than $150. What snakes!
Don't fear sending her up in the snow. My Bravada had the same drivetrain and was good in the snow.
GAM
I want to like my Envoy but it just has so many problems that shouldn't exist. The Bravada was even worse. The drivetrain is great and I like the styling. I stopped at the body shop to see about the rust on the inside of the doors. The body guy said he seen several like mine. '03 vehicles with rust problems? Maybe with '70's technology but not today. Oh well, I guess I have a decision to make. Unfortunately, I've lost over 50% of the value of the car as a trade in in 2 years.
GAM
GAM
GAMM
tidester, host
I think the PCM and or the BCM also retain the mileage of the vehicle.
That said, I am amazed at all the whining on this board about seemingly insignificant things not working properly (brake lights, noisy stabilizer bar links, etc., etc.) on what is a very complex vehicle. People seem to expect perfection in everything these days, but I think those expectations are not very realistic. Just take a run through some of the complaints about other makes on these boards .... And quityourbitchin. If you don't like what you got, get something else and be done with it. :sick:
I drove 3 -- the Cadillac V-6 SRX, the Cadillac CTS-V (which is the competitor to BMW's M-5 with the 400 HP Corvette engine from last year's ZO-6), and just for the heck of it, a wagon that I have always liked, the Saab 9-5. I absolutely loved both Cadillacs! The SRX is a definite "buy." I loved the handling and the V-6 engine is plenty strong and supported nicely by the transmission. It had the $1,800 super sunroof that extends almost the length of the vehicle. Makes it almost like driving a convertible! The CTS-V was also a stunner -- wonderful handling, wonderful brakes, incredible acceleration. I want one! The Saab was nice, but not in the same league with these two. I wanted to drive the new Corvette, but there were too many people lined up for a ride. Ditto for some of the competitors -- particularly a couple of BMWs. You also get a ticket for a free lunch!
All in all, this must have cost GM a bundle ... and they are putting on these dog and pony shows at several venues across the country. I hope it helps their sales. Incredible as it may seem, based on their respective stock prices, Harley Davidson is now worth more than GM! (That's as whacky as paying some kid millions of bucks to play ball.) In fact, just 1 year of Toyota's profits would buy all of GM! Should that translate into some good deals? You betcha! (Anyone want to buy a lightly used 04 Envoy with lots of goodies on it?)
Uh, what planet are you from? Really? Non functioning brake lights insignificant?
Are you completely out of your mind? I suppose if I get rear ended on the freeway because of that it's insignificant. GM can't figure out how to do turn signals either, based on their latest recall. This stuff should have been perfected 75 years ago.
Hyundai learned how to make a better car and now they are at the top of their class. Can't I expect my $38K GM to be as good as a $15K Hyundai? I can't afford to get a different vehicle as the resale sucks so bad that I'm barely ahead of the game. How PO'd would you be if your 2 year old vehicle was rusting. GM just doesn't get it and neither do you!
GAM
So why didn't you buy a Hyundai and save 15 Grand ... and a lot of grief? (A non-functioning brake light can be remedied in 5 minutes by changing the bulb.)