I’m compelled to post this, as I find it is a serious problem and I want a record here and on the web of my problem. My 2nd GM product with a 3.4 engine, a 2001 Montana, is costing me big time. The major problem, the coolant system, is costing my close to $3000 for a van with 160k … not much.
Many others have the same problems. They say it is related to DEXCOOL, made by Texaco – that eats gaskets. Petitions are being signed. Lawsuits are being launched.
Here is a laundry list of my troubles:
In case you’re looking for a Montana – I wanted to post a laundry list
of problems I’ve had with it, so the internet could archive the
problems for all to see.
all figures in kms
~160k – more coolant leaks – this time internal. in shop today looking for them
- check engine lite on again – 2 more o2 sensors probably. Needs rear head gasket – will do front one while in there : $1200.
~150k – intake manifold seal – mechanic says he does these before
first tune up on Montanas. Cost $700. Did spark plugs while in there
… wires were welded on to tops – took 2-3x longer to hack off wires
and extricate plugs – cost ~ $300.
Mechanic thinks DEXCOOL may be the problem, since he has done many GM
engines with these gaskets. Replaced Dexcool with regular antifreeze.
~140k – wipers broken again. Froze on to windshield, didn’t free
them. Could not turn them off fast enough – they killed themselves.
$100 for some unknown component. Terrible design, especially where it
~130k – water pump
~120k – wiper park problem. Up here in Canada, snow collects at
bottom of windshield where wipers want to park. If they are blocked
at all, they kill themselves trying to park. New wiper module – $250
~110k – replaced EGR valve. $150. check engine light on again -
phantom codes – no diagnosis.
~100k – Dash lights burn out easily. They are also not easy to repair
like the old days. Cost a couple of hundred to replace a few bulbs,
since dash has to be pulled and new bulbs soldered in.
~75k – Front wheel bearing started howling – found a used one and
~20k – check engine light always coming on. replaced a few O2 sensors
Here are some websites related to the problem: