2001 Catera, 2nd owner, 8K from local GM dealer bought with only 31K original miles on it. Mechanical nightmare. Two weeks after purchase: all seals went, entire cooling system replaced and engine stripped and rebuilt under warranty. All due to GM's Dex-Cool. It eats the seals. March '09: replaced radiator and water pump, again under warranty, and again due to Dex-Cool. At 45K rear third brake light strip burnt out, not warranteed. Replaced by dealer, part cost 400.00 alone. July 09: back to dealer for coolant leaks, transmission hesitation, and all- around 'groaning' whenever car turns a corner. The Catera is a nightmare. No more GM's in my driveway.
Fun to drive, comfortable long-distance tourer with very nice interior features, surprisingly roomy for four adults and exceptionally large trunk - but a totally unreliable car.
Cars have been considered reliable since the self-starter was invented - how GM screwed-up on the Catera is a mystery. If you own one, send it back to GM or just plain junk it - buy a used BMW.