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Here we go. Removing PS reservoir did the trick, those hoses are obnoxious to pull off. Pulley or tensioner look like they need attention?

bolt got out, I move the ac line ever so slightly and the bolt came across the little bend in the line without interference. I don’t have clearance to bring it up the side of the engine, but currently thinking I’ll drain the PS fluid and remove the reservoir.

parts catalog picture for reference too.

Adding for reference and future searchability, the doco I’m seeing. It appears to be LC3 specific.

This is quite a job. Got all three belts off - took an extension on my breaker bar to move the PS pulley tensioner. And magically small hands to get the upper bolt on that tensioner haha. Looking forward to putting it back together, I'm sure it's a piece of cake! Book says the PS pulley has...

Thank you gentlemen!

Good afternoon! Two questions about the registry. Is the serial the last four digits of the VIN? Is there a form I can submit to update the registry? Happy to contribute to make sure the info for my car is up to date.

So my car is definitely out of spec. Down 26mm front and 23mm rear. I assume either a previous owner intentionally lowered it somehow or that’s a ton of spring sag. Tomorrow I’ll have a helper who can bounce the car with the tech2 with me, interested to see what I find.

I can’t find any doco for that. Only to read, but not to recalibrate. My [completely untested] hypothesis is that correcting the car’s trim height to remain within specification should bring the suspension calibration settings in line, provided the height sensors are functioning correctly. It...

This info sent me down a fun rabbit hole, of how to make sure everything is as correct as can be, thank you! Sharing some details I found for future searchability if anybody else wants to do this. The Tech2 can read each corner’s voltage level under ESC Data List. Voltage should increase when...

Want to pre-emptively examine the PS belt tensioner and pulley, as I’ve been advised this can be a significant failure and I understand the parts are a concern. Book says, remove all belts, then remove the two bolts holding the PS belt tensioner, then three bolts for the PS pulley. Makes...

If anything, hardtop convertible that was electronically controlled dates back to 1938 Buick Y job - one might argue MB should license that from GM!

Perhaps by 2004 when they Northstars were fixed, that also happened to be the year they showed up in RWD applications so people mistakenly correlated the two?

Anybody have a perspective on the PF26 being superseded by the PF63? My gut reaction is that the smaller PF63 is a less capable filter in terms of flow rate or capacity, but I assume it doesn’t work like that or GM wouldn’t have made the replacement.

I see some listings for the OEM shocks note “without jumper harness” for the rear shocks. What is this and does it matter?

Thinking out loud for XLR specific stuff, beyond the usual used car mechanical inspection items: Make sure the headlights and taillights all work (including individual LEDs in the taillights) and are not cracked (replacements are hard to find) Confirm the operation of the top Check for evidence...

You mind sharing what part numbers you used for your replacements? I'm curious if they're from performance package or something, which may have a harsher ride than expected?

Spark plug torque - 15Nm or 11lbft Spark plug gap - .040 Spark plug PN - 41986 or 41-986 Ignition coil PN - D593A or GN10419

It was just a prototyping exercise, there’s no business case for it as they’ll never sell in the volume to make any money unfortunately. It’s actually pretty impressive that our current XLRs got built haha.

In summary - top was inoperable, you replaced the pump and performed a relearn and it went down but not up. Then after consulting with the experts you used the tech2 to clear the codes then do a relearn and it worked both up and down?