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Old 12-08-2018, 01:59 AM   #26
Greenlee
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Re: Hatzies 2005 2500HD

Nice looking truck!
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Old 12-11-2018, 01:03 PM   #27
hatzie
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Re: Hatzies 2005 2500HD

I replaced the plugs and wires around the same time as I did the fluids but I didn't comment on it.

NOTE: If the heat shields are rusted away the replacement is ACDELCO 8006 and aftermarket options exist. Mine were fine so I re-used them.

There are supposedly two different coils used on the LQ4 truck engines with differing output terminal position and different length plug wires.

Delphi XS10389 wires for Coils Stamped 12558693 10.5in "Square coil"
Delphi XS10388 wires for Coils Stamped 19005218 9.2in "Round coil"

I use dielectric grease inside the boots on both ends so the wires will actually come off the plugs next time I do them.
The original plugs were the now obsolete AC Delco 41-985 Platinum plugs... Why not use the 41-110 Iridium plugs that are shown as replacements a lot of places?

I wanted to avoid the rumored idling problems and fuel mileage issues that are blamed on the 41-110 plugs.
She idles smooth and gets around 13-14mpg hwy on the new plugs and wires as opposed to the 10-11mpg and slightly rough idle I was getting on the old plugs and wires so I'm happy.

I use Never Seize in the threads. Be exceedingly careful to not get this on the electrodes or past the threaded section of the plugs. I apply it with a plumbers acid brush rather than the slop brush in the bottle to keep it confined to the threads. It's conductive so it'll make trouble if it gets on the ceramic or in the plug boot.

Service bulletin on the spark plugs...

Bulletin Number: 13D-070
Date: May 21, 2013
To: DDG Headquarters and Branches
Category: Product
From: Brad Brunken, Product Development Line(s): 41

Subject: ACDelco Spark Plugs 41-110 and 41-962 - Application Update

Description

ACDelco announces that 2006 and older, as well as some 2007, spark plug service applications
covered by the iridium spark plug 41-110 have moved to the platinum plug 41-962. For the
older model years, GM used a double platinum spark plug in production, and these older
applications are to be serviced with the double platinum plug 41-962. 2007 and newer
applications used iridium plugs in production and service requirements will remain assigned to
the iridium plug 41-110. Both plugs meet original equipment specifications for the applications
designated. Catalog changes for the Epicor and WHI systems will be updated in the June
release 2013. ACDelco recommends you begin adjusting your stocking requirements for the
41-962 in preparation of the upcoming catalog updates. The estimated sales volume split
between the two spark plugs is 50/50 based on these application changes and vehicles in your
markets.
__________________
1959 M35A2 LDT465-1D
1967 Dodge W200 B383, NP420/NP201
1969 Dodge Polara 500 B383, A833
1972 Ford F250 FE390, NP435/NP205
1976 Chevy K20, 6.5L, NV4500/NP208
1986 M1008 CUCV
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...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; 12-12-2018 at 11:36 AM.
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Old 12-12-2018, 03:54 PM   #28
hatzie
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Aiming the headlamps

Brand new headlamps are not aimed properly. One of mine was setup for squirrel hunting in the trees.

The adjustment method in the video works very well.
I would recommend doing this after dark.

You need;
  • I've forgotten the exact size... external Torx socket (I needed an unknown E-Torx size to pull the seats so I bought a set that included E4 through E22 with some gaps)
  • Two inch wide blue painters tape
  • Sharpie
  • Yardstick to mark centreline on the tape on the door
  • Thirty foot measuring tape.
  • 5 or 6 gal bucket filled with sand
  • Four or five foot landscaping stake

I put a landscaping stake in a bucket of sand at 25ft from the garage door I was using and backed the truck up til the corner of the front bumper was even with the stake.

I'll add a picture HERE of the centre mark on my GM headlamps.
__________________
1959 M35A2 LDT465-1D
1967 Dodge W200 B383, NP420/NP201
1969 Dodge Polara 500 B383, A833
1972 Ford F250 FE390, NP435/NP205
1976 Chevy K20, 6.5L, NV4500/NP208
1986 M1008 CUCV
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...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; 12-12-2018 at 03:59 PM.
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Old 12-13-2018, 08:18 PM   #29
Palf70Step
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Re: Hatzies 2005 2500HD

Very nice truck. I think damn near every 03-07 I come across is the Silver Birch color (oir black). Makes me wonder if any were painted a different color

My new to me 06 is Silver Birch too.
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Old 12-13-2018, 11:01 PM   #30
hatzie
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Re: Hatzies 2005 2500HD

There are a lot of them.
If I need body panels I don't have to paint em...
__________________
1959 M35A2 LDT465-1D
1967 Dodge W200 B383, NP420/NP201
1969 Dodge Polara 500 B383, A833
1972 Ford F250 FE390, NP435/NP205
1976 Chevy K20, 6.5L, NV4500/NP208
1986 M1008 CUCV
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...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.
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Old 12-13-2018, 11:05 PM   #31
Palf70Step
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Re: Hatzies 2005 2500HD

Very True, never thought of that!
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Bill

1981 GMC High Sierra SWB Stepside

2006 GMC Sierra 1500 SWB W/T
Member of Louisiana Classic Truck Club (LCTC)
Board Vendors
Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
It's scary when you start making the same noises as your coffee maker.
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