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11-10-2010, 11:04 PM
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#1 |
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Registered User
Join Date: Jul 2008
Location: louisville, ky
Posts: 502
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Anybody have a factory manual for a NP203 equipped truck?
What kind of oil does it say to put in the NP203? I want to know what the owner's or shop manual says. I believe it is 10W-30 or 10W-40. Thanks.
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11-11-2010, 07:01 AM
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#2 |
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Next!
Join Date: Jan 2003
Location: Eastern Pa.
Posts: 2,483
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Re: Anybody have a factory manual for a NP203 equipped truck?
Should be 30 wt non detergent, correct me if I'm wrong.
__________________
86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck |
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11-11-2010, 12:00 PM
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#3 |
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Registered User
Join Date: Jul 2008
Location: louisville, ky
Posts: 502
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Re: Anybody have a factory manual for a NP203 equipped truck?
I've seen some things that say New Process intended it to have straight 30 weight non-detergent, like you said, but I have no idea where to find the New Process specs. The cheesy Haynes manual I bought for my truck says 10w-30, but I don't necessarily trust it. I'm curious what GM, Ford and Dodge said to put in. And I assume some of those trucks were in the military. I wonder what their manuals said.
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11-11-2010, 03:09 PM
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#4 | |
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Registered User
Join Date: Mar 2009
Location: MD
Posts: 417
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Re: Anybody have a factory manual for a NP203 equipped truck?
Quote:
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2006 Silverado Crew Cab 1500 4x4 5.3L automatic 1986 M1008 CUCV 6.2L Detroit Diesel TH400 4.56 Detroit Locker rear NP208 1973 K20 "Silverado" 350ci, HEI, TH350, NP203 with 2wd conversion, A/C, power windows,tilt wheel, dual tanks. My '73ish K20 thread My 5yo son claims it as his. 1987 V20 Custom Deluxe 350 TH400 NP208 "farm truck" getting parted out. 2016 Nissan Altima grocery getter/commuter |
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11-11-2010, 06:48 PM
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#5 | |
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Next!
Join Date: Jan 2003
Location: Eastern Pa.
Posts: 2,483
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Re: Anybody have a factory manual for a NP203 equipped truck?
Quote:
__________________
86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck |
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11-11-2010, 07:35 PM
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#6 |
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What do we get for $10?
Join Date: Oct 2004
Location: Beardstown, Illinois
Posts: 340
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Re: Anybody have a factory manual for a NP203 equipped truck?
Direct from my '77 owner's manual and in the General's own words:
Sorry for the crappy cell phone pic.
__________________
1977 GMC K25 400/400/205 1989 Chevy Suburban R1500 350/700R4 (work beater) 1994 Chevy K3500 dually 454/4L80 1996 Corvette LT4 350/ZF 6 speed 2000 Bonneville SSEI Supercharged 3.8 Liter V6 1966 Chevelle 2 door sedan (Needs major repair  )
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11-11-2010, 07:40 PM
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#7 |
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Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: Anybody have a factory manual for a NP203 equipped truck?
I looked in my 78 shop manual and all it says about 203 oil is to use "ENGINE OIL". thats the exact words.
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11-11-2010, 11:05 PM
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#8 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Anybody have a factory manual for a NP203 equipped truck?
was told that too and that the full time,with a part time kit has to be run quite a bit more then usual as the front isn't oiled if not engaged?.....still new to me and i don't mind usin it
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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11-11-2010, 11:27 PM
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#9 |
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Registered User
Join Date: Jul 2008
Location: louisville, ky
Posts: 502
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Re: Anybody have a factory manual for a NP203 equipped truck?
Thanks for the input, guys. Still not sure which way I'm going to go. The 203 is in my '79 K20, which is all the sudden getting alot more use than usual since the engine in my '70 K10 burb spun a bearing or something. I'd forgotten how unnerving it can be to drive a full-time truck at 70 mph. This truck usually just sits except when something needs to be hauled or pulled.
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