Hi all,

The EBCM on my Terraza has gone flaky. When it gets warm I get all related lights. I can reset with Tech2.

Picked up replacement unit but am having problem reprogramming It with Tech2 and TiS2000. Tried in pass through and disconnected / download mode. I can download config to Tech2000 and also install software update from TSS. However, when trying to then update module it fails shortly after going into high speed mode. In pass through it just fails partway.

Maybe it is my Chinese Tech2 although it seems to be able to do everything else. The EBCM is a newer part number (made in China rather than Mexico). Could the EBCM software version be newer so that it needs TIS2web or something. If I just try updating software without going into replace module then I get an error message about calibration I'd marked with an * are unrecognized.

Any help appreciated. Thx.

I thought GM came out with a fix that wouldn't allow people to download to non-genuine Tech2'*?

Either way, I'd start off with the fact that you have a cheap clone. Verify with a real one. Tis the price you pay when you buy cheap.

Ha. Well, the Chinese clone has been able top do everything to date including PCM, key fobs, etc. For the home mechanic, who can not justify $3k for a scanner, they seem just fine. But hey, while I do own some SnapOn stuff, I also buy from Harbor Freight.

You are right in that being cheap comes with a price. My worst mistake with being cheap was buying my Terraza new instead of dropping an extra $2k on the Toyota. I own a Jaguar, a VW and have even had Italian cars so I am familiar with what might be considered unreliable marques. The Buick has been the worst vehicle I have ever owned by a long shot despite exceptional maintenance. Electrical problems from day 1, two transmissions, every suspension part front and rear at least once, sliding door issues, every component that the serpentine belt turns, rotors warping, steering rack, EBCM, craked dash, junk leather, the list is endless. Need to keep it alive till early next year but the experience will make it difficult for me to ever buy another GM product.

Victory. I was finally able to program my EBCU with a bit of help from someone on another forum.

The weird twist had to do with the fact that I have an aftermarket radio (Kenwood). The radio uses an aftermarket digital converter type box that sits between radio and car. I think it is used for OnStar and possibly steering wheel controls. Anyhow, that apparently interferes with communications when trying to program the module.

Once I disconnected the radio and the module I was able to program the new EBCU without a hitch. Reconnected the radio afterward and all good.

Note that I also reduced the comm port and Tech2 speed in TIS200 to 57600 which is apparently needed on some cars prior to 2007.

Hope this helps someone. As for being cheap, I learned that lesson when I bought my Terraza new to save a couple of $$ over the Toyota. Despite being well maintained, the Terazza has been , by far, the worst vehicle I have ever owned (and I have owned Jaguars, Fiats, Alfas, and VWs). Electrical issues from new, two trannys, every single component moved by the serpentine belt, almost every suspension component front and rear, steering rack, quart of oil every thousand miles since new (GM says this is within normal specs), the list goes on. It now has 150k miles on it although I hope to be rid of it come next year.

Quart per thousand? No way does GM allow that....

Congrats on figuring it out! Thanks for reporting back.

Sorry the ongoing issues with the car.

150k miles, 1 quart per 1000 miles = 150 quarts. 1 quart=$3.00 avg. That'* $3000 just in oil.

If it'* not leaking it anywhere then it must be burning it. There'* some energy to be had from the oil when it burns, offsetting the cost a bit. The Google thinks that 150 quarts of engine oil is roughly equivalent to 23.5 gallons of gasoline. In 150,000 miles that is an extra 0.0001656217 gallons per mile.

If Amphicar770 got the EPA'* combined rating of 18MPG out of his Terraza and filled his fuel tank to the top whenever it reached a quarter tank, the oil consumption may have added an effective equivalent of up to 0.052875 gallons of gasoline to that tank of gas. This would make it such that Amphicar770 was actually getting something like 17.949MPG on gasoline and the other 0.051MPG from engine oil.

Like having a 2-stroke engine except no mixing fuel and a lot quieter.

Probably doesn't help any, but it is the bright side of inexcusable oil consumption.

Yes, a quart of oil every 1000 miles since new is unacceptable, I would surmise either the rings didn't seat properly which is almost unheard of nowadays or the PCV system was defective from the get go. That said, what would be most troubling to me would be the 2 replacement transmissions that this vehicle has required in 150k miles. Even if they were covered under warranty the downtime and inconvenience to the owner would qualify this vehicle as a genuine PITA.

By the way: