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My 2003 GMC Sierra 4.3L 6 cyl (97,000 miles) has developed a serious engine miss. It runs OK when started up cold, but once it fully warms up the stumbling and missing begin; sometimes so bad that the truck shakes and slows down. But the Check Engine light never comes on. Work done so far: new...

My 2003 Sierra 4.3L engine pickup's original alternator started making noise (high pitched squeaking) at around 60,000 mi. Replaced it with a NAPA rebuilt unit. Now, with only about 23,000 miles on the NAPA alternator, it has started making the same screeching noise. Does anyone know what...

I bought my 2003 GMC 1/2 ton pickup new. 80 - 90% of miles are on the highway. OCI has been 5000 mi, using synthetics (M1 5W-30, GC 0W-30, Havoline Synth 5W-30, and PP 5W-30). Total miles on truck are about 81,000. Not sure when I first started to notice the lifter noise - maybe the last year or...

My son recently bought a 2004 Lexus ES330. Has about 50,000 mi on it. He has the original owner's manual, but not a service manual. In the owner's manual it states that the V6 engine has solid lifters, but nowhere in it could we find anything about how often the valve clearance should be checked...

I'm searching for a quality replacement radiator for my 96 T-Bird. I'd prefer a name brand radiator made in the USA. But based on my experience so far, this is not as easy as it might seem. I wanted a Modine radiator, but learned that Modine sold its replacement radiator business to an outfit...

In the local cities newspaper, a weekly car maintainance column guy stated in answer to one of this week's questions, that he starts his stored vehicles once a month for a half hour (outside his garage) to warm the various lubricants and run the A/C system. I know that starting engines in...

My 2003 GMC Sierra 4.6L V-6 engine (65,000 mi) has recently started to show symptoms (must crank warm engine several seconds to start) of a failing fuel pressure regulator. Failing fuel pressure regulators at low miles (sometimes under 30,000) has been a problem on GM engines for many years...

My son owns a 2000 Impala (3.8 L engine) that has suddenly developed a serious, intermittent stalling problem. He has been to a couple mechanics and a large Chev dealer - has spent a fair amount of money all ready with no improvement. Both my son and I have been searching for websites and...

The early Ford 4.6 L V-8 engines are notorious for worn valve stem seals as the miles accumulate. My 96 T-Bird (58,000 mi) uses little oil yet (except with M1 5W-30 Trisynthetic) so the seals must still be pretty good. I keep debating in which type synthetic oil would result in less valve stem...

I have been using Fram air filters for many years because that's the only brand carried by most places I frequent - other than some off breed brands. I have now found a store that sells Wix and another that carries Puralator air cleaners. I have not yet done a price comparison. Any quality...

Noticed on local Walmart shelves last night that Motorcraft oil is gone, gone, gone. But the new Havoline SM dino is $1.42/qt, as opposed to the old Havoline SL dino which went for about $1.17 or so. $1.42 is same price MC used to be at Walmart. So looks like Havoline is their replacement for...

2003 GMC Sierra 1/2 ton pickup 4.3L V-6 30,700 miles at time oil sample drawn Oil Filter - ST3980 Oil Consumption - none Over 50 % highway miles Drive period - 9/04 - 12/04 Blackstone Labs Oil: Citgo Supergard 5W-30 First number is my oil sample, second number is Universal Average per...

I've seen comments in various threads here at BITOG that claim Delvac 1300 15W-40 meets 10W-30 specs at low temperatures. But the current viscosities listed at the Mobil website look pretty high to match a 10W-30. The low temp spec shown for Delvac 1300 15W-40 is 6000 cP @ -20 C. Isn't the SAE...

My current snowthrower has a Briggs & Stratton 8 HP 4-cycle engine (flathead, not OHV). The engine does not have a lot of hours on it, and I have have always used Mobil 1 5W-30 oil in the crankcase with good starting and low oil consumption. This Fall when I changed the oil, I put in M1 0W-40 -...

Does anyone know if Donaldson or Fleetguard make an equivalent filter to the AC P52, and if so what the model numbers are? Thanks