Low power on 2001 6.0 - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**hatzie** · 08-25-2020, 10:01 AM

The dealership shops are usually full of parts changers.
Sounds like your mechanic is not much better.

Take it to someone that will actually diagnose it. Don't clear the codes in the ECM. It makes it a lot more difficult to get a read on what's happening.

rws1012 · 08-26-2020, 10:24 PM

The two shops I took it to said they would put it on a computer. I think both just guessed at it. First shop charged $100 and had it 3 days. Chevy dealer was $89 and they kept it two days. I remember in the 70's, shops had big diagnostic machines that showed all the cylinders firing. Real impressive machine.. Now it is hand held that spits out numbers. LOL!! Thanks for the reply's

**hatzie** · 08-26-2020, 11:15 PM

Time was if a decent shop didn't fix the thing and couldn't figure out what's wrong they didn't charge for it.
Nowadays they plug in and expect the machine to tell them a part to change. When that doesn't work they bill you and lie.

Either find a trustworthy shop or learn to diagnose it yourself.
You will need a bi-directional diagnostic tool and a decent set of service documentation. An Asian Tech 2 clone may still be an option. I bought mine for around $300. Autel has a range of $500-$1000 tools that will do quite a lot. Yes the Maxisys Ultra is very nice but so is the price.
Alldata DIY is the people that publish Mitchell independent service manuals IIRC. They're worth a shot for docs.

**biketopia** · 08-31-2020, 07:34 AM

FYI, Alldata is it's own entity and service manual subscription. Mitchel is similar, much harder to use, and is under the snap on umbrella. We have had both my shop for years and this year decided to not renew Mitchel.

**hatzie** · 08-31-2020, 11:22 AM

Quote:

Originally Posted by biketopia

FYI, Alldata is it's own entity and service manual subscription. Mitchel is similar, much harder to use, and is under the snap on umbrella. We have had both my shop for years and this year decided to not renew Mitchel.

I read somewhere they were the some company.
Since you work in the industry and a fellow board member I will take your word on it.

Here's Eric O talking about online service info.
He mentions NASTF.org as a place to begin searching.

http://www.youtube.com/watch?v=L1FxoQI_Fw4

rws1012 · 10-01-2020, 10:54 PM

Update: Bought new ignition coils last week. Put them on Tues. evening. Today I drove the truck and it drove a lot better. Will pull my gooseneck dump trailer that is full of scrap metal next week and let you know how it pulls with a load. Was really pleased with todays drive.

08-25-2020, 10:01 AM	#26
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Low power on 2001 6.0 The dealership shops are usually full of parts changers. Sounds like your mechanic is not much better. Take it to someone that will actually diagnose it. Don't clear the codes in the ECM. It makes it a lot more difficult to get a read on what's happening. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

08-26-2020, 10:24 PM	#27
rws1012 Registered User Join Date: Apr 2016 Location: Sapulpa Ok. Posts: 71	Re: Low power on 2001 6.0 The two shops I took it to said they would put it on a computer. I think both just guessed at it. First shop charged $100 and had it 3 days. Chevy dealer was $89 and they kept it two days. I remember in the 70's, shops had big diagnostic machines that showed all the cylinders firing. Real impressive machine.. Now it is hand held that spits out numbers. LOL!! Thanks for the reply's

08-26-2020, 11:15 PM	#28
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Low power on 2001 6.0 Time was if a decent shop didn't fix the thing and couldn't figure out what's wrong they didn't charge for it. Nowadays they plug in and expect the machine to tell them a part to change. When that doesn't work they bill you and lie. Either find a trustworthy shop or learn to diagnose it yourself. You will need a bi-directional diagnostic tool and a decent set of service documentation. An Asian Tech 2 clone may still be an option. I bought mine for around $300. Autel has a range of $500-$1000 tools that will do quite a lot. Yes the Maxisys Ultra is very nice but so is the price. Alldata DIY is the people that publish Mitchell independent service manuals IIRC. They're worth a shot for docs. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 08-26-2020 at 11:26 PM.

08-31-2020, 07:34 AM	#29
biketopia Senior Member Join Date: Jul 2015 Location: Warrenton VA Posts: 1,107	Re: Low power on 2001 6.0 FYI, Alldata is it's own entity and service manual subscription. Mitchel is similar, much harder to use, and is under the snap on umbrella. We have had both my shop for years and this year decided to not renew Mitchel. __________________ 71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350

10-01-2020, 10:54 PM	#31
rws1012 Registered User Join Date: Apr 2016 Location: Sapulpa Ok. Posts: 71	Re: Low power on 2001 6.0 Update: Bought new ignition coils last week. Put them on Tues. evening. Today I drove the truck and it drove a lot better. Will pull my gooseneck dump trailer that is full of scrap metal next week and let you know how it pulls with a load. Was really pleased with todays drive.



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