my 2004 GXP is showing a cyclinder falt. I took it to the shop and they said it was cylinder 1 missfired due to moistur in the coil. They told me that the coils come in a pack of 4 and cannot be purchased seperatly. Is this true? should all 4 be done at the same time?

thanks,
drskunk

Looking at Rockauto, it looks like the coil packs come in sets of 4 attached to a bracket. It may be the only way GM/ACDelco sells them. But it looks like they unbolt from the plate and individual aftermarket coils are available.

_________________

WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights

thank you for the response. They are telling me that #2 is showing signs of moisture so i decided to have them all replaced. I love this car and want to be proactive to prevent any other issues with it.

You should be able to purchase them separately. GM calls the aluminum bracket that all four mount to, the "Cartridge". You do not need to replace all 4 for 1 faulty one. Also, between the "cartridge" and the cam cover, there is a rubber grommet around the each hole (it effectively slides over the coil pack as it extends into the plug hole). Sometimes those can be worn/brittle, particularly if that particular coil was shorting out in anyway.

_________________


Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

You can replace each one individually if you want to.
But in the end, it would be money well spent to buy both sides, all eight, ..., & just move on with no more worries.
I tried replacing one or two at a time by using some from a salvage yard.
But the back side is so hard to get to, ..., if you're in the back, do it all at once & be done.
Yes, I learned the hard way & did one coil, then had to go back in a few weeks later & did the whole cartridge.

_________________
1) 2001 Pontiac Trans Am 10th Anniversary Firehawk #0270/038
2) 2015 Ford F-150 SCrew 4x4
3) 1986 Pontiac Fiero GT
4) 2004 Pontiac Grand Prix GTII

For the back, just remove the EGR pump and it's just as easy as the front.

_________________


Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

autozone shows pictures of them individually for $79 each or $159 for a full bank of 4. Ebay has AC Delco parts for these for $169 as well.

There was a redesign in the coils.
Those individual ones are the new design, and unless you've already changed out the bracket, will not fit your current setup.

Drew

_________________
Pontiac stable:
2005 Bonneville GXP - Black -daily driver
2004 Sunfire - Arrival Blue Metallic -Wife's
1998 Grand Prix GT - Black -seen better days, awaiting fate
1985 Fiero Sport Coupe - Black (mostly) - long term rebuild

What did they change? Looking it up in SI, which I updated through 2009 as well as GMPD, shows no difference in the part. They look identical and the coils can be individually removed from the aluminum bracket "cartridge".

Or are you saying a new bracket "cartridge" is needed to accomodate the redesigned coil?

_________________


Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

I believe the difference is in how the coils fit into the bracket.
I have to apologize for my uncertainty.
I don't actually own a GXP (yet, which is why I have so few posts), so I haven't handled the old style.
However I am a parts counterman, and just last month I was tasked with finding out why the new coil we had ordered for a customer (with an 04 I believe) didn't fit. The info I'm passing along is from the Wells tech department, who also informed me GM had made the change as well.

Hope this helps.

Drew

_________________
Pontiac stable:
2005 Bonneville GXP - Black -daily driver
2004 Sunfire - Arrival Blue Metallic -Wife's
1998 Grand Prix GT - Black -seen better days, awaiting fate
1985 Fiero Sport Coupe - Black (mostly) - long term rebuild

No worries Drew. It's good info.

_________________


Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

Found it:
New OE design coil with horizontal connector replaces old design coil with vertical connector.
Must use C1509 coil assembly when replacing individual old design coil.

Drew

_________________
Pontiac stable:
2005 Bonneville GXP - Black -daily driver
2004 Sunfire - Arrival Blue Metallic -Wife's
1998 Grand Prix GT - Black -seen better days, awaiting fate
1985 Fiero Sport Coupe - Black (mostly) - long term rebuild

Ahh, ok. So it's the electrical connector/pigtail to the cartridge harness. That would make sense as a lot of GM's newer CNP setups use a horizontal connector style coil.

_________________


Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck