Used Buick Rainier Buying Guide: 2004-2007 Years, Faults, Recalls

The Buick Rainier was built for only four model years, 2004 through 2007, and the one worth buying now is a 2006 or 2007. Those trucks got stability control, more power from both engines, and curtain air bags with rollover deployment where fitted. Pick the 4.2 six for daily use or the 5.3 V8 if you tow, and don't sign until the driver door module fire recall and the headlamp module recall show as done on the VIN.

I worked from Consumer Guide's 2004-07 Buick Rainier review, the IIHS ratings page that covers the Rainier and its GM siblings, and NHTSA recall data for each Rainier year, all read on Sunday, October 18, 2026. If a known problem isn't in one of those, I didn't include it. That rule kept this shorter than the forums would like.

What you're actually buying

The Rainier was Buick's version of the GM midsize body-on-frame SUV shared with the Chevrolet TrailBlazer, GMC Envoy, Oldsmobile Bravada and Isuzu Ascender. It came only as a five-seat regular-length model. For 2004-2005 you got a 275-hp 4.2 six or a 290-hp 5.3 V8, both with a four-speed automatic, in rear drive or an all-wheel drive with no low range. So don't plan serious off-roading. For 2006 the six went to 291 hp, and the V8, now rated at 300 hp, could shut off four cylinders while cruising. Curtain air bags became optional for 2005, when Buick cut the lineup to the CXL trim. IIHS notes the Rainier was gone after 2007.

Consumer Guide called it the quietest and best-riding of the GM group, credited to a standard rear air suspension plus laminated glass in the windshield and front doors. It also says handling stays truck-like and that test Rainiers averaged 12.7 to 17.4 mpg with the six. That's not great. It's the price of a V8-capable frame SUV.

If the report shows an accident

A CARFAX or AutoCheck line that says an accident was reported tells you something happened. It won't tell you what got fixed, or how well. On a Rainier, look at three things. First, the rear air suspension: a rear hit can damage it, and a truck that sags overnight or bounces on its rear axle needs a closer look. Second, the windshield: recall 05V035 was about 2005 windshields whose urethane bond might not hold in a crash, and a cheap replacement job can leave the same weakness. Third, any air bag deployment: ask for the repair invoice that shows new modules, not just a cleared warning light. Our guide to what "accident reported" means on CARFAX explains how those entries get there, and the post on negotiating over an accident entry covers how much it should take off the price.

Known faults Consumer Guide lists

• Fuel level senders corroded by sulfur on 2004-2006 trucks, so the gauge shows fuel when the tank is empty and the engine stalls.
• Water in the transmission on 2004-2005 six-cylinder trucks, showing as rust on the dipstick and a shudder at 40-50 mph. The fix is a new dipstick tube.
• All-wheel drive acting strangely after rain or a car wash on 2004-2005s, from water getting into the rear speed sensor wiring, and ABS warning lights from a bad ground.
• OnStar modules that go dead on 2004-2006 trucks and need replacing.

Pull the transmission dipstick yourself during the test drive. If it looks rusty, walk away.

Recalls to clear by VIN

• Driver door module, 2006-2007: recalls 12V406, 13V248, 14V404 and 15V599 cover fluid that corrodes the window and lock switch board, which can melt, smoke or catch fire even while the truck is parked. Under 13V248 some modules only got a protective coating, and 15V599 replaces the module outright, so ask which one was done.
• 15V519, 2006-2007: the headlamp driver module can overheat and leave you with no headlights.
• 05V455, 2006: a power steering hose that can fracture in hard steering while braking.
• 2004-2005: tail lamp bulbs that work loose (04V527), turn signals that flash like hazards (05V198) and the 2005 windshield bonding defect (05V035).

Check them with our Buick recall check by VIN walkthrough, or read NHTSA's 2006 Rainier recall list. Our Buick VIN decoder guide confirms engine and drive.

Rainier versus the TrailBlazer

Don't mix the names up. Our used Chevy Trailblazer guide covers the 2021-and-later crossover, a completely different vehicle. The Rainier's sibling is the 2002-2009 TrailBlazer, and the recall list shows it, since nearly every 2006-2007 campaign names both. The Buick costs a little more, and in return you get the standard air suspension, more sound insulation and an all-wheel-drive option that Consumer Guide says the Chevy never offered. On older SUVs like these, condition matters more than which badge it wears.

Before money changes hands

A Rainier today is at least 19 years old, so title problems are as likely as mechanical ones. Search NMVTIS for salvage or flood brands and confirm the year and engine on NHTSA's vPIC decoder. Then buy the history report yourself, since a seller's PDF is easy to fake. We're a licensed CARFAX and AutoCheck reseller and aren't affiliated with CARFAX, AutoCheck, Experian or GM. In mid October 2026 we charge roughly $5.50 per report for guests and $4.50 for members, or about $6.75 for both reports together, against $39.99 to $44.99 at retail. Prices move, so confirm at checkout.

Sources

• Consumer Guide: 2004-07 Buick Rainier; IIHS: 2007 Buick Rainier
• NHTSA recallsByVehicle, Buick Rainier 2004-2007, queried Oct. 18, 2026; NHTSA vPIC; NMVTIS