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2006 gmc envoy_denali
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861 Posts
Discussion Starter #1
I want to change the oils in my Transmission, Front and Rear Differentials, Transfer Case to synthetic, probably Amsoil. The transmission seems to need about 11 to 13 liters, but I can't find any information (other than the type of fluid required) for the other items. I would appreciated it if someone could tell me how much fluid I need and their opinions of other brands such as Royal Purple and Mobile 1 synthetics for all my oil needs.
 

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GM Specs are Critical!

Use any lubricant you like, as long as it meets the GM specifications in your owners manual. As far as I know, only GM makes the special autotrak fluid specified for the transfer case. If your truck has a G80 rear axle, you can't just use generic gear lube either. See your owners manual for details.

-- Dan Meyer
 

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2005 chevy trailblazer_lt
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434 Posts
You need to stay with the GM Autotrak fluid for the transfer case. The rear, and front differentials will do well with Amsoil Severe Gear 75W-90. They changed the spec on the tranny from Dexron III to Dexron IV. Redline D6 will do well here. As far as oil, many choices. I have not done an oil analysis yet, I am finishing a cycle of Auto RX now, but will probably first try Pennzoil Platinum. If the UOA is good I will stay with that. My next choice will be Mobil 1, which I have read alot of guys use. I would like to try Amsoil oil, but I have an extended warranty, and to play it safe, I will stick with a GM "approved" oil until that warranty expires.
 

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2006 chevy trailblazer_lt
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721 Posts
:iagree:

In addition, as for capacities, the transfer case is 2 quarts of Auto-Trak II available from your dealer.

The front diff is 2 quarts of synthetic 75W-90, and I believe the G80 is the same capacity, but may need a special synthetic.

The GM fluid is very expensive, over $30 per quart list, so an aftemarket alternative that meets GM's specs is the way to go unless you are still in warranty, in which case you might want to consider the extra cost a good investment to prevent the dealer from claiming that the oil you used caused the problem--it doesn't happen often, but it does happen.
 

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2007 chevy trailblazer_ss_1ss
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1,852 Posts
I use Amsoil myself. I consider Amsoil to be the best and then Royal Purple and Mobil 1. If you want to get a transmission flush done at the dealer, you can provide your own fluid and it will be cheaper. You need 16 quarts for that. Amsoil ATF meets the Dex VI requirement, which why I bought it (especially after I found out that the dealer prices are actually cheaper than what Amsoil advertises on their site). Front diff will need 2 quarts and the rear diff should take 2 quarts unless you have an SS. Amsoil Severe Gear has the limited slip additive in it IIRC. The transfer case does need to stay with the Autotrak II fluid.

Double D, why would Amsoil void the extended warranty? If you're going to use the Pennzoil, why not just use Amsoil if you want to? What difference does it make?
 

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2005 chevy trailblazer_lt
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434 Posts
My manual states to use an oil that meets or exceeds GM6094M. Although an oil may actually exceed this spec, if the oil mfg has not paid for the test to certify their oil, Gm will not consider it an acceptable oil. If a problem occurs with the engine, and they may try to state oil related failure, they can use this to deny coverage. Even if a dealer says it will back say Amsoil, and a sample is sent to the warranty company, they can test and deny based on this. It has gone both ways in the past, but I figure I will be safe and cover that scenario.

GM6094M Registered Products*
Revision Date: 11-Dec-2007
Current ILSAC GF-4 Products
Product Name SAE Viscosity Grades ILSAC Grade
76 Firebird LD Motor Oil 10W-30 GF-4
76 High Performance Full Synthetic 5W-30, 10W-30 GF-4
76 High Performance Motor Oil 10W-30 GF-4
76 Super Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
AC Delco 5W-20, 5W-30, 10W-30 GF-4
Advantage 5W-20 Synthetic Blend 5W-20 GF-4
Advantage 5W-30 Synthetic Blend 5W-30 GF-4
Agip 4-SYNT 5W-20, 5W-30, 10W-30 GF-4
Agip Super 5W-30, 10W-30 GF-4
Agip Super PC 5W-20 GF-4
Amalie Imperial Turbo Formula 5W-20, 5W-30, 10W-30 GF-4
Amalie Xcel Super Turbo 5W-20, 5W-30, 10W-30 GF-4
Brad Penn Superior Fuel Efficient 5W-20, 5W-30, 10W-30 GF-4
Cam2 International Super Pro Plus 5W-20, 5W-30, 10W-30 GF-4
Cam2 International Synavex 5W-20, 5W-30 GF-4
Castrol GTX 5W-30, 10W-30 GF-4
Castrol SLX Professional 4718 5W-30 GF-4
Castrol Syntec 5W-30, 10W-30 GF-4
Castrol Syntec Blend 5W-30, 10W-30 GF-4
Chevron Supreme 5W-20, 5W-30, 10W-30 GF-4
Chevron Supreme Synthetic 5W-20, 5W-30, 10W-30 GF-4
CITGO SUPERGARD 5W-20, 5W-30 GF-4
CITGO SUPERGARD Synthetic 5W-30, 10W-30 GF-4
Coastal 5W-20, 5W-30, 10W-30 GF-4
Conoco Super All Season Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
Conoco Syncon High Performance Synthetic 5W-30, 10W-30 GF-4
Esso Extra 5W-20, 5W-30, 10W-30 GF-4
Esso Uniflo 5W-30, 10W-30 GF-4
Exxon Superflo 5W-20, 5W-30, 10W-30 GF-4
Formula Shell 5W-20, 5W-30, 10W-30 GF-4
Formula Shell Synthetic 5W-30, 10W-30 GF-4
Formula Shell Synthetic Blend 5W-30, 10W-30 GF-4
GM Goodwrench 5W-20, 5W-30, 10W-30 GF-4
GM Goodwrench High Mileage 5W-30, 10W-30 GF-4
GM Goodwrench Synthetic Blend 5W-30, 10W-30 GF-4
Gulfpride Advanced Fuel Efficient 5W-20, 5W-30, 10W-30 GF-4
GulfTEC Synthetic Blend 10W-30 GF-4
Kendall GT-1 Full Synthetic 5W-30, 10W-30 GF-4
Kendall GT-1 High Performance Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
Lordco Semi-Synthetic Multigrade Motor Oil 5W-20, 5W-30, 10W-30 GF-4
Lubriguard 5W-20, 5W-30, 10W-30 GF-4
Mobil 1 0W-30, 5W-30, 10W-30 GF-4
Mobil 1 Extended Performance 10W-30 GF-4
Mobil 1 Truck & SUV 5W-30 GF-4
Mobil Clean 5W-20, 5W-30, 10W-30 GF-4
Mobil Clean 5000 5W-20, 5W-30, 10W-30 GF-4
Mobil Clean 7500 5W-20, 5W-30, 10W-30 GF-4
Mobil Clean High Mileage 5W-30, 10W-30 GF-4
Mobil Super 1000 5W-20, 5W-30, 10W-30 GF-4
Mobil Super 2000 5W-30, 10W-30 GF-4
Mohawk Multigrade Motor Oil 5W-20, 5W-30, 10W-30 GF-4
Navigaurd 5W-30 GF-4
Northland MW Select 5W-20, 5W-30, 10W-30 GF-4
Northland, Synergy Synthetic 5W-30 GF-4
Pennzoil Motor Oil 5W-20, 5W-30, 10W-30 GF-4
Pennzoil Platinum Full Synthetic 5W-20, 5W-30, 10W-30 GF-4
Pennzoil SUV, Truck and Minivan Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
PepBoys Proline 5W-30, 10W-30 GF-4
Petro-Canada Arctic Synthetic 0W-30 GF-4
Petro-Canada Maximum 5W-30, 10W-30 GF-4
Petro-Canada Supreme 5W-20, 5W-30, 10W-30 GF-4
Petro-Canada Synthetic 5W-20, 5W-30, 10W-30 GF-4
Petro-Canada Synthetic Blend 5W-30 GF-4
Petro-Canada XR4 5W-30, 10W-30 GF-4
Petro-Canada XR4 Synthetic 0W-30, 5W-30 GF-4
Phillips 66 TropArtic Full Synthetic 5W-30, 10W-30 GF-4
Phillips 66 TropArtic Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
Phillips 66 TropArtic Turbo Motor Oil 10W-30 GF-4
Q HorsePower Full Synthetic 5W-30, 10W-30 GF-4
Quaker State 4x4 & SUV Synthetic Blend 5W-20, 5W-30, 10W-30 GF-4
Quaker State Advanced Engine Full Synthetic 5W-20, 5W-30, 10W-30 GF-4
Quaker State High-RPM Synthetic Blend 5W-30, 10W-30 GF-4
Quaker State Peak Performance Motor Oil 5W-20, 5W-30, 10W-30 GF-4
Rallye Turbo Approved 5W-20, 5W-30, 10W-30 GF-4
Safety-Kleen America's Choice 5W-20, 5W-30, 10W-30 GF-4
Safety-Kleen Performance Plus ZR 5W-20, 5W-30, 10W-30 GF-4
Service Pro 5W-20, 5W-30, 10W-30 GF-4
Smitty's Supply Sureguard Advanced Formula 5W-30, 10W-30 GF-4
Texaco Havoline 5W-20, 5W-30, 10W-30 GF-4
Texaco Havoline Synthetic 5W-20, 5W-30, 10W-30 GF-4
US Oil 5W-30 GF-4
Valvoline 5W-20, 5W-30, 10W-30 GF-4
Valvoline DuraBlend 5W-20, 5W-30, 10W-30 GF-4
Valvoline SynPower 5W-20, 5W-30, 10W-30 GF-4
Walmart Supertech 5W-30, 10W-30 GF-4
Warren 5W-20, 5W-30, 10W-30 GF-4
 

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Premium Member
2006 gmc envoy_denali
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861 Posts
Discussion Starter #7
Want to thank everyone for the info. The manual states what to use but not how much. I'm liking Amsoil for all the fluid refills which I will do when it warms up here (-36 degrees Celsius this AM). Since the truck is now off warranty I want the best products since I am now the warranty. First mod for 2009 will be a complete tranny oil change as per TrailVoy instructions with a tranny cooler installed as added protection.:http://forums.trailvoy.com/images/smilies/thx.gif
 

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2003 gmc envoy_slt
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7,190 Posts
I use Amsoil myself. I consider Amsoil to be the best and then Royal Purple and Mobil 1. If you want to get a transmission flush done at the dealer, you can provide your own fluid and it will be cheaper. You need 16 quarts for that. Amsoil ATF meets the Dex VI requirement, which why I bought it (especially after I found out that the dealer prices are actually cheaper than what Amsoil advertises on their site). Front diff will need 2 quarts and the rear diff should take 2 quarts unless you have an SS. Amsoil Severe Gear has the limited slip additive in it IIRC. The transfer case does need to stay with the Autotrak II fluid.

Double D, why would Amsoil void the extended warranty? If you're going to use the Pennzoil, why not just use Amsoil if you want to? What difference does it make?
Did you mean 16 Pints? The owners manual for my '03 calls for 5qts. Also to Double D; nice find on the oil ratings. Is that listed here on TV somewhere?
 

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2007 chevy trailblazer_ss_1ss
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Did you mean 16 Pints? The owners manual for my '03 calls for 5qts. Also to Double D; nice find on the oil ratings. I that listed here on TV somewhere?
No, 16 quarts. 5 quarts is for a transmission service.
 

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2002 gmc envoy_slt
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116 Posts
Had my frt. and rear fluids changed about a week ago notice they put 80w90 back in is this going to be a problem because manual calls for 75w90 Synthtic?
I dont even no if it's Syn. they put back in.
 

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Premium Member
2007 chevy trailblazer_ss_1ss
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Had my frt. and rear fluids changed about a week ago notice they put 80w90 back in is this going to be a problem because manual calls for 75w90 Synthtic?
I dont even no if it's Syn. they put back in.
As long as it is synthetic, it'll be fine. I would check with whoever you had do the services and make sure.
 

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2004 gmc
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What kind of place would fail to follow the manufacturer's requirements? A high end shop or a low end Walmart oil-monkey joint? (You can quess what I think of mass-market lube operations.)

Did you also do the transfer case? Its required interval is 50K, which is far before the diffs, even.
 

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2002 gmc envoy_slt
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Took my truck back to the shop and asked them what kind of fluid they put in my Diff's ,Guy looked on the computer then went back in the garage for awhile came back and said they put what in what was required but never did tell me if it was Synthetic. I don't know if this is related but my gas mileage has went down about 2.5 mpg.
 
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